engine oil question

[robmanch]

i have an '04 93 linear.

do i have to use 0w30 or can i use a thicker oil?

i heard 5w30 just cuts a few miles off of the MPGs. but i dont want to risk it. please help. thank you.

[Dave 37]

0W-30 and 0W-40 are specified. Later, they added 5W-30. However, all years specify GM-LL-A-025 oils. In Europe, there are many choices. In the U.S., Mobil 1 0W-40 and Castrol Syntec 0W-30 European Formula seem to be the main oils available. The Castrol variant is sold by Autozone and the Mobil 1 0W-40 much more widely. There are other oil that may be easy to find in your area but are not nationally available, such as Total Quartz Energy 9000 0W-30.

Saab says that if you can't find the right oil, use an ACEA A3/B3 oil, which is not much easier to find. Mobil 1 0W-40 is the easiest.

I think a 0W oil is better for most people than a 5W oil.

[JonV]

Originally Posted by Dave 37

0W-30 and 0W-40 are specified. Later, they added 5W-30. However, all years specify GM-LL-A-025 oils. In Europe, there are many choices. In the U.S., Mobil 1 0W-40 and Castrol Syntec 0W-30 European Formula seem to be the main oils available. The Castrol variant is sold by Autozone and the Mobil 1 0W-40 much more widely. There are other oil that may be easy to find in your area but are not nationally available, such as Total Quartz Energy 9000 0W-30.

Saab says that if you can't find the right oil, use an ACEA A3/B3 oil, which is not much easier to find. Mobil 1 0W-40 is the easiest.

I think a 0W oil is better for most people than a 5W oil.

Where in the US is GM Spec 5W30 available, or even called for in an SS? It's used in a 97 or 92? It will be fine though, it just has to be changed sooner....

Viscosity deals with flow at specified temperatures, it has nothing to do with being better or worse as a lubricant.

Here's a few readily available LL A 025 Oils besides Mobil 0W40


Elf Evolution
Gulf Formula GMX
Quartz total Energy (ELF Excellium)
Castrol Syntec Euro
Amsoil Euro

a couple of not so available:
Ravenol LSG
GMCOil

and of course,
Royal Purple

[Chiliman]

So the $11 Mobil 1 5W-30 5qt i saw at Walmart yesterday (almost grabbed 10 bottles) is not worth getting?

[JonV]

Originally Posted by Chiliman

So the $11 Mobil 1 5W-30 5qt i saw at Walmart yesterday (almost grabbed 10 bottles) is not worth getting?

I'll put that under personal choice, opinions will vary. There is a European GM Spec 5W30 Mobil 1, but none in the US. I'd say just change it sooner.