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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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It really makes no discernable difference if you check oil level hot or cold (overnight) as long as you allow a few minutes for the (hot) oil to run down to the pan and dipstick it on a level surface.

The oil level range on the dipstick allows for some oil expansion and contraction with heating/cooling.

A conscientious owner will be able to determine the best fill level for engine operation and oil consumption within the first year of ownership. Some engines like the level at the top of the hashmark, others the middle, others at the lower area.

The "factory" recommended level with filter usually puts the oil at the middle or upper half of the hashmark.

GM/Cadillac is very specific concerning my Northstar - halfway up the hashmark or 7.5 quarts with filter. A pertinent TSB details why the "full" mark or higher is overfilled and why trying to maintain that high level leads to excessive oil consumption, primarily by the PCV system.

Remember that, in cold weather, if you get heat in 2 miles of driving the internal engine guts are still stone cold. It takes at least 10 miles of driving to get it all up to proper design temps.
 

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'14 CTS-V LongRoof; '16 ATS-V Sedan,' 04 Trailblazer 4x4; '10 CTS LongRoof gone but never forgotten
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I use my Oil Temp gauge as my guide as to when my engine is actually warmed up.
 

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2010 CTS4 sedan
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So now I have gotten into a habit of checking my oil at every gas fill up (now its like once a month fill up).

I heard you can check your brakes by running your hand across the rotor and if you feel a rim at the edge it is time for a change, is there any truth to this?
This is absolutely true. I've been told that a "rim job" costs about $100 up here and that it's well worth it. Might be worth exploring.
 

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'14 CTS-V LongRoof; '16 ATS-V Sedan,' 04 Trailblazer 4x4; '10 CTS LongRoof gone but never forgotten
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A 'rim job', lol?
 

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Black/Black 2013 CTS Sedan 3.0L RWD (102k miles)
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Discussion Starter #45
I just realized that there is a 0W-30 oil out there ... is it a viable substitute for our 5W-30s? Especially for me, I live in SoCal where the winters are not really winters. Will it improve my gas efficiency as well as lubricate my engine faster during starts?
 

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**2014 CTS4 Sport Wagon-Luxury**
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not that you have to use it but I haven't seen a Dexos 1 Generation 2 motor oil in 0W30...I wouldn't think the change would get you enough to make the change worth it fuel economy wise...

furthermore...the 0 part of 0W30 is the winter weight so if you don't see extreme cold that wouldn't really benefit you...

Bill
 

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That '0' portion is only for the initial cold startup. Where you could actually use even a '10' because of the warmth, just stay with the recommended '5' weight, 5w - 30. 0 is for the Yankees up north.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Go ahead, blame me. Everybody does 🙄
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My son's Subie specs 0W20 synthetic.
 

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'14 CTS-V LongRoof; '16 ATS-V Sedan,' 04 Trailblazer 4x4; '10 CTS LongRoof gone but never forgotten
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I know my son's F150 specs 20 weight. Not sure of the W spec
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Ford runs 5W-20 in most of their cars and light trucks. Our Explorer V6 takes it and uses not one drop in 5 or 6 thousand miles.
 

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2011 CTS Coupe FE3, 2003 Thunderbird, Gone 2013 ATS, 02 Deville
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my 2003 Thunderbird 3.9 V8 wants 5W-20. but now I use 10W-30 Syn on the bird and the caddy. It's Vegas Baby.
 

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'14 CTS-V LongRoof; '16 ATS-V Sedan,' 04 Trailblazer 4x4; '10 CTS LongRoof gone but never forgotten
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I would have a hard time with twenty weight, too. Ford must be trying to eek out every last mpg they possibly can. I don't see with my little pea brain how twenty weight can lubricate today's high temperature, high performance engines.
 
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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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I've run three V8 F-150s over 125,000 miles each in mechanical service calls. None of them leaked or used a drop of Pennzoil 5W-20 synthetic in over 6,000 miles between changes. The V6 Explorer has only 45,000 on it and uses essentially no oil.

All depends on engine design and build tolerances.

......... and today's oils are not what I started out with -

Kendall oil can.jpg
 

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OEM spec, gotta go with it.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Ford specs 5W-20 for their light trucks and most cars.
 

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Black/Black 2013 CTS Sedan 3.0L RWD (102k miles)
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Discussion Starter #58
So are 0W-20, 5W-20, 5W-30 all interchangeable? I understand that the 20s are a bit more thinner than the 30s. However can you use a 20 weight on a 30 or does it only work the other way around where a 30 can be used in a car designed for 20 weight? It seems you guys think the 30 offers more protection than a 20.
 

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Use OEM, Bob. You won't go wrong. Our engines were designed this way, run with it.
 

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**2014 CTS4 Sport Wagon-Luxury**
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they are not interchangeable...as mentioned...try to follow the recommendations in the owners manual...

in a bit of contrariness my 2007 F150 5.4 3V Ford changed the spec from 5W30 to 5W20...these engines have an oiling issue and the recommendation from everyone other than Ford was to go back to the 5W30 and replace the OEM oil pump with a higher volume oil pump...

I can say that in the 2 years I have owned it the change to 5W30 full synthetic from 5W20 synthetic blend (changing the oil pump on this 4WD is cost prohibitive for me right now based on the overall condition of the truck) has made a difference and issues the original owner reported (he's Family) haven't occurred since I changed from my initial oil change of 5w20 to the 5W30 I've used on the last 4 oil changes...

that said...unless those you trust tell you different...I'd stick to what the engineers call for with your engine and I've seen nothing with our engines to change from 5W30 full synthetic...

Bill
 
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