: I changed my oil. With 15w-50 mobile 1. And maybe its in my head but....



1QUICKV
08-17-06, 07:10 PM
I changed my oil. With 15w-50 mobile 1. And maybe its in my head but it feels like the car has a lot more hp. the car moves a lot faster then it used to. From a dead stop the car just moves faster then i think it used to. Does the computer adjust as the oil goes bad? but im not saying the oil had something to do with the car moving faster. i always change the oil at 2,ooo miles or so, because of how i drive. and am i crazy to put 15w50 in? race car put straight 50 motor oil. 5w-30 is water with a yellow die....:confused:


and another thing, does anybody no if exhaust cutouts add hp on a fly or does the computer have to adjust the fuel and air mixtures?

LV_V
08-17-06, 09:06 PM
Its a waste in the LS6 to change your Mobile 1 every 2k miles. Unless you're dipping your dipstick in the dirt before you reinsert it ;)

1QUICKV
08-17-06, 09:13 PM
i tell you your write but i had 10w 30 mobile one extended and it was like water. and some how the oil rest it self some how....

rand49er
08-17-06, 09:23 PM
Why wouldn't anyone use 5w-30 Mobil 1 as specified by GM? The viscosity varies with temperature as it is designed to do. It lubricates, protects, and cools the engine components just fine.

'Nuff said. :thehand:

Barak
08-17-06, 10:14 PM
I wonder who's write [sic]?:suspect:

OldRoadDawg
08-17-06, 11:03 PM
and am i crazy to put 15w50 in?

:yup:

rbrown81
08-17-06, 11:33 PM
I used to change my oil every 3000 miles until I had a chat with a friend who works as a lead engineer on a joint venture between shell and mobil/exxon developing new oils and additives. He told me that while he appreciates the business, modern synthetics have no business being changed every 3000 miles. So long as the filter is kept clean, you can run mobil 1 for up to 10,000 miles.

Now I wouldnt do this myself as I am quite paranoid. However, I do run my oil for 5000 miles with a filter change every 2500. With the price of Mobil 1 these days, it saves me a pretty penny and leaves more for mods :)

crypto_coyle79
08-18-06, 01:41 AM
you can call me crazy but I change my oil when the car tells me too, about 7-9000 miles. Although I have to add 1 quart in 1/2s over that time do to good old LS* oil usage:alchi: < OIL
and when I say " I change " I mean sombody else

6104696
08-18-06, 06:53 AM
another oil change thread. Always a lively topic.

Prior to the V, I was a dino oil man who hcanged the oil every 3K. With the V and the pricey synthetic, I've been waiting till I had 20% usage left (though the first oil change was at 1K and the second was at 3K due to the LS6 metal shavings).

The new mustang GT has no magnet on the drain plug so I can't judge metal. It came with a synthetic blend (5w-20). I've swapped that out with dino oil at 1400 miles; it was pretty clean. At 3K miles I'll swap that out again, switch to Mobil 1, and go to a 5K-6K routine.

after close to 30 years of driving I've never had an oil or lubrication related problem (though I generally will not keep a car much past 80k miles or so....)

thebigjimsho
08-18-06, 08:10 AM
(though I generally will not keep a car much past 80k miles or so....)You elitist snob, you!

6104696
08-18-06, 03:06 PM
You elitist snob, you!

it is my civic duty to give others the opportunity to own perfectly maintained, affordable, and reliable, pre-enjoyed enthusiasts cars.

CIWS
08-18-06, 03:37 PM
Mobil 1 Synth with filter 5K miles no matter what the life monitor says.

calicadi
08-19-06, 12:36 AM
I changed my oil. With 15w-50 mobile 1. And maybe its in my head but it feels like the car has a lot more hp. the car moves a lot faster then it used to. From a dead stop the car just moves faster then i think it used to. Does the computer adjust as the oil goes bad? but im not saying the oil had something to do with the car moving faster. i always change the oil at 2,ooo miles or so, because of how i drive. and am i crazy to put 15w50 in? race car put straight 50 motor oil. 5w-30 is water with a yellow die....:confused:


and another thing, does anybody no if exhaust cutouts add hp on a fly or does the computer have to adjust the fuel and air mixtures?

It's not in your head unless it's in mine, too. On fresh Mobil 1 the engine spins up faster. I doubt it's measureable in terms of horsepower increase, but could be. Also doubt the computer adjusts the engine in relation to oil life. But it does keep track of factors besides mileage that contribute to shortening the oil lifespan.

1QUICKV
08-19-06, 01:58 AM
thanks for the info. but fresh oil never hurt the motor. i could never wait until 5,000 mile to change my oil, i just get to crazy and just want to do it.

50 4Ever
08-19-06, 10:21 AM
Why wouldn't anyone use 5w-30 Mobil 1 as specified by GM? The viscosity varies with temperature as it is designed to do. It lubricates, protects, and cools the engine components just fine.

'Nuff said. :thehand:

I wonder that also. I use 5W-30 and change it when the oil life is down to just below 10% (It goes down about 3% every time I fill up iwith gas).

The tolerances in the LSx engines are such that you should only run 5W-30, according to Dave Hill, the Corvette Chief Engineer that recently retired.

mberisha
06-16-11, 07:47 AM
I'm digging up this old thread.....

Just a quick question....with my V running at sustained 120mph+ speeds....and my oil temp getting up to 250F on some occasions....should I maybe up the viscosity of the Mobil 1 for my oil change this weekend (i.e. 15w50w)...or stay w/the factory weight?

BTW...the V here is my Sunday driver....so when I take it out....it's wide-open and the rpms stay at a consistent 3500rpms+ (i.e. harldy ever idles or stuck in traffic). Thanks for your inputs....

rand49er
06-16-11, 08:59 AM
I'd suppose, in theory at least, that going to a 5W-40 or 5W-50 might make sense in your case with the ability of those oils to handle higher operating temps. But, does anyone know if, say, 30 protects to sustained 200 deg F, 40 protects to sustained 225 deg F, 50 to 250 deg, and so forth? Personally, I don't know what the actual numbers are.

darkman
06-16-11, 10:01 AM
This an interesting question that comes up all the time - do higher operating temperatures (measured only by oil temp as opposed to coolant temp) require increased viscosty oils? And is 250 F all that high for synthetic oils? (We make french fries at 375 F.)

We see racers run thicker oils all the time but they often have engines set up with increased bearing clearances for these thicker oils and are compensating for the fuel dilution that occurs from running full throttle (not just higher cruising speeds) all the time.

lollygagger8
06-16-11, 10:23 AM
Mmmm.....french fries.


Um ya, I'll keep the 5w-30 and continue to change mine every 3k. Done and Done.

mberisha
06-16-11, 10:46 AM
This an interesting question that comes up all the time - do higher operating temperatures (measured only by oil temp as opposed to coolant temp) require increased viscosty oils? And is 250 F all that high for synthetic oils? (We make french fries at 375 F.)

We see racers run thicker oils all the time but they often have engines set up with increased bearing clearances for these thicker oils and are compensating for the fuel dilution that occurs from running full throttle (not just higher cruising speeds) all the time.

Great point....also...the coolant temp gets to about 222F-225F.....

What concerns me...is usually we'll do an AutoBahn run...and then do a "Bavarain Hill Climb" which is usually 3rd gear pegged for 5-6 mins.....and then turn around....go downhill...and then jump back on the Autobahn taking turns passing each other 4th gear pegged....and then cruise at 5th.

darkman
06-16-11, 11:28 AM
Great point....also...the coolant temp gets to about 222F-225F.....

What concerns me...is usually we'll do an AutoBahn run...and then do a "Bavarain Hill Climb" which is usually 3rd gear pegged for 5-6 mins.....and then turn around....go downhill...and then jump back on the Autobahn taking turns passing each other 4th gear pegged....and then cruise at 5th.

The Mobil1 5W-30 has a 100C viscosity of about 11, and the Mobil1 15W-50 has a 100C viscosity of 18. If it were me I would be looking for something in between. Mobil 0W-40 starts out at 13.5, but I have used it (not in the V) and have seen it shear quickly to a 30W in used oil analysis. If I were in you place I would look at the German Castrol 5W-40 which has a 100C viscosity of 14.

mberisha
06-16-11, 11:32 AM
The Mobil1 5W-30 has a 100C viscosity of about 11, and the Mobil1 15W-50 has a 100C viscosity of 18. If it were me I would be looking for something in between. Mobil 0W-40 starts out at 13.5, but I have used it (not in the V) and have seen it shear quickly to a 30W in used oil analysis. If I were in you place I would look at the German Castrol 5W-40 which has a 100C viscosity of 14.

Darkman....as always...thanks for the great advice! I take it that there are no issues with switching from Mobil 1 to German Castrol?

darkman
06-16-11, 11:37 AM
Darkman....as always...thanks for the great advice! I take it that there are no issues with switching from Mobil 1 to German Castrol?

None - modern motor oils don't have any compatability issues. If you were to run used oil analysis on the first batch of the new oil you would see traces of the additives from the old oil but that would be the only evidence of the switch.

mstrjon32
06-16-11, 12:32 PM
The question is, do they sell GC at the auto shop, or will you have to buy it on the economy...

mstrjon32
06-16-11, 12:36 PM
FWIW, I'm using Mobil 1 5W-30 and an M1-206 filter, changed as per the OLM, when it gets to the 5%-0% range. I once saw a lengthy presentation (I could probably find it) published by GM engineers that basically said when the OLM reads 0%, your oil still has another "50%" of serviceable life left in it, but the cleaning and additive packages are basically worn out. Seems reasonable enough for me.

I might see if I can get some UPF-44 Ultraguards from Luke before my next oil change.

mberisha
06-16-11, 01:29 PM
The question is, do they sell GC at the auto shop, or will you have to buy it on the economy...

Funney you say that...I just got out of the Ramstein BX....they don't sell that oil.

I asked the guy what it is on the local economy....he said ~22Euro a quart...so that's breaks down to about $34 dollars a quart times 5.5....WHAT?!?!?!

So Darkman....would you not advise using Mobil 1 0W-40 at all...or just change it more frequently. For example...in the last 8 months....I only put 2,500 miles on the V.

darkman
06-16-11, 01:51 PM
Funney you say that...I just got out of the Ramstein BX....they don't sell that oil.

I asked the guy what it is on the local economy....he said ~22Euro a quart...so that's breaks down to about $34 dollars a quart times 5.5....WHAT?!?!?!

So Darkman....would you not advise using Mobil 1 0W-40 at all...or just change it more frequently. For example...in the last 8 months....I only put 2,500 miles on the V.


Their is nothing wrong with Mobil1 0W-40 except it is really a 30 weight disguised as a 40 weight. I suspect, but do not know, that Mobil calls it a 40 weight to qualify under a Mercedes or other European specification. When I used it, the used oil analysis rated it as a 30 weight after very short periods. Used for extended periods it still provided the protection of a good 30 weight. Do you have any other options (at the Ramstein BX) in the 40 weight category?

mberisha
06-16-11, 01:57 PM
Royal Purple

mstrjon32
06-16-11, 02:14 PM
I'll try and stop by the Kastel Car center tomorrow and see if they have it, I feel like I saw something in gold bottles last time I was there, and I'm pretty sure it's some type of Castrol.

I do know that a 5-quart jug of M1 costs about 96 euro at the Real, so I'm not at all surprised by the price you heard for the Castrol.

I'll probably continue to run the M1 5W-30 regardless...

darkman
06-16-11, 02:42 PM
Royal Purple

I am not a fan of Royal Purple. Not because it is bad oil, but because it has such a cult-like following and yet always falls "in the middle of the pack" in oil comparison tests. In any event their Product Data is attached and their 40 weights are a happy medium between Mobil1 5W-30 and Mobil1 15W-50.

http://www.royalpurple.com/prod-pdfs/motor-oil-ps.pdf

Finally, if you can get Mobil1 5W-30 and 15W-50 at reasonable prices, you could blend them to achieve results somewhere between the two.

mberisha
06-16-11, 03:10 PM
Great info Darkman....looks like I'll give the Royal Purple 0W-40 a try.....is that the weight you were thinking as well for the Royal Purple?

darkman
06-16-11, 03:21 PM
Great info Darkman....looks like I'll give the Royal Purple 0W-40 a try.....is that the weight you were thinking as well for the Royal Purple?

Yes on the 0W-40.

To see if the new oil is doing what you need it to do - check your current oil pressure at full operating temperature. I cannot give you a specific target because the oil pressure gauges on these cars vary too much. In theory, it should be about 10 psi for every 1,000 rpm, but it will vary. The new oil should be able to achieve the same oil pressure under the more stressful conditions you have described (sustained 120 mph, etc.) . If the new oil falls short in terms of oil pressure, then you would go to a higher viscosity.

mberisha
06-16-11, 03:35 PM
Awesome info...and I can't thank you enough for all the help and walking me through the oil choices:worship:...do you take PayPal?:xlol:

I'm changing the oil first thing in the morning (7hrs ahead of you)...and I'll report back when I punch those AutoBahn runs with the new oil weights!:bows:

mstrjon32
06-16-11, 04:28 PM
What concerns me...is usually we'll do an AutoBahn run...and then do a "Bavarain Hill Climb" which is usually 3rd gear pegged for 5-6 mins.....and then turn around....go downhill...and then jump back on the Autobahn taking turns passing each other 4th gear pegged....and then cruise at 5th.

(psssst...We live in Rheinland-Pfalz, not in Bavaria))

mberisha
06-16-11, 04:36 PM
(psssst...We live in Rheinland-Pfalz, not in Bavaria))

Rog....but EVERYONE knows what Bavaria is....not what Rheinland-Pflaz is....ahhahhaah....rookie!

JDB
06-16-11, 10:26 PM
Their is nothing wrong with Mobil1 0W-40 except it is really a 30 weight disguised as a 40 weight. I suspect, but do not know, that Mobil calls it a 40 weight to qualify under a Mercedes or other European specification. When I used it, the used oil analysis rated it as a 30 weight after very short periods. Used for extended periods it still provided the protection of a good 30 weight. Do you have any other options (at the Ramstein BX) in the 40 weight category?

Yup...it's a 30 weight in no time. Blackstone tested in Audi applications. Audi changed it's requirement to 5w40 syn oils. I would not use the 0w40 in my V. I switched to M1 5w40 TDT when I put a bigger turbo on my A4. But its on the heavy side for a V probably. Need send in that sample of M1 5w30 to Blackstone to see if I'm sticking with that in the V.

kevm14
06-18-11, 11:39 AM
Seems like GC 0W-30 would be ideal for these conditions.

I also have a theory that thinner oils (to a point) get into more crevices and, thus, pull more heat away from critical components (remember oil is also a coolant). This manifests as higher oil temps. But it should reduce overall engine temps, possibly reflected in the coolant temp if your system is at 100% capacity (at 225 I'd say it is). So an experimental way to figure this out would be to run different oils and see if the coolant temp responds opposite to the oil temp. You'd be limited to exchanging the heat to air via the oil pan, but at a higher temp, you'll be shedding more heat.

The oil has a job to do, and its job is not necessarily to run as cool as possible.

mstrjon32
06-18-11, 04:46 PM
So did you put new oil in it today Met, or what? What did you go with?

mberisha
06-18-11, 07:05 PM
So did you put new oil in it today Met, or what? What did you go with?

Well....the BX didn't have the recommend weight of Royal Purple....so I ended up picking up a case of M1 0W-40.....:beat:...(they were even out of M1 5W-30) but with all the on and off rain....never got a chance to put in the oil and try it.

Anyways...I fly out for the Chi-Town tomorrow morning at 530am....so I won't be doing anything w/the V until mid-Jul.....so hopefully you'll find the oil and be the guinea pig before I get back to report! :sneaky:

mstrjon32
06-19-11, 02:41 PM
I'm probably going to flush my clutch fluid and might do the brakes in that time, but the oil life is still at 40%-ish, and I'm not really planning on changing it until it says 0%.