: What Oil?



Scotty_G
06-06-04, 11:55 PM
I have an 01 Eldorado and i'm wondering what oil to use? It's 10w30 right? or is it 5W30...?

bbozsik
06-07-04, 12:04 AM
10W30 for most applications, unless you live in northern canada... then you might want to use WD40.

caddyshack24
06-07-04, 01:05 AM
10W30 for most applications, unless you live in northern canada... then you might want to use WD40.
WD40 ? ha ha.
Yeah, what he said. The brand is pretty much up to you.. synthetic vs conventional blah blah blah. most seem to use mobil 1 though

JSMeloche
06-07-04, 08:36 AM
Im in northern Canada thanks for the tip heh!

Seriously, i use 10w30 in the winter and 5w30 in the summer, always Synthetic. A lot of people tell me that synthetic is not worth the cost, but compared to a new engine it sure is cheap insurance ;)

Roswell256
06-07-04, 10:57 AM
I run 10w30 Mobile Mineral Oil. Its run in evey car my parents owned and 2 of them, that I can remember, made it almost to 300k. They were only retired becasue the car fell apart around the engine.

I know I have an oil leak and I'm not moving to synthetic becasue I'm afraid I'll lose oil faster.

BeelzeBob
06-07-04, 11:11 AM
I have an 01 Eldorado and i'm wondering what oil to use? It's 10w30 right? or is it 5W30...?


Obviously neither you, nor the other posters, have read the owners manual for your car.....

As of the 2000 model year, the Northstar engine is specifically spec'd for 5W30 motor oil. That means that your 2001 Eldorado is supposed to be filled with 5W30 . Synthetic oil is absolutely not required nor recommended. Any good quality 5W30 motor oil that is rated SL or has the GF3/GF4 starburst symbol on the can is fine.

Personally, I have found in our testing that the Mobil conventional 5W30 "drive clean" oil performs excellently as well as Texaco "Havoline" 5W30. Unless you want to spend a lot more money on oil changes for synthetic it is not required nor is there any advantage to using it in the 2001 Northstar.

Change the oil per the oil life monitor your car has, use the conventional 5W30 oil, don't overfill the oil sump (7.5 quarts at a change with a dry filter) and it will run for hundreds of thousands of miles.

Type in "oil" or "synthetic oil" into the search feature of the forum tool bar and read the debate......

JohnnyO
06-09-04, 09:51 PM
:coolgleam My mom's 99 calls for 10w-30, my dad's new 04 calls for 5w-30. I generally run Mobil 1 in both. I've gone 'round with bbob about this, but some of us just sleep better at night knowing the car has synthetic in the oil pan. (btw, I'm 43 and have a family of my own) I just did a bunch of maintenance work on my mum-in-law's car tonite because it's my idea of fun. :)

Quadrasteer
06-11-04, 08:29 PM
Has anyone tried using one of the higher viscosities of M1, like 5w-40 or 15w-50? The 10-30 goes through my '99 Deville pretty fast.

JohnnyO
06-11-04, 11:12 PM
:coolgleam I don't think the higher vis will flow enough at cold temps and start-ups. The manual specifically says NOT to use higher viscosity oils. When you think about it, a higher vis oil may not burn off as much simply because it's not getting to places where it gets burned. My take is that using synthetic in my 2-stroke jetski obviously burns cleaner and helps spark plug life (a lot), then it ought to do the same in my Mom's '99 Eldorado that burns a quart every 1000 miles or so. :D

El Dobro
06-12-04, 12:32 PM
Have been using the factory recommended oils in my Cadillacs for years and have never had an oil related problem.