I picked up 30 quarts of the Autozone clearance Mobil 1 High Mileage 10w40. Also some Castrol High Mileage 10w40. I think these will be ok in the 8.1 big block besides winter time. After i use these up will 0w40 cause more consumption? It has 140k miles and these engines are known oil burners anyways. I'm in northern Michigan so winters are cold. Thanks for any opinions.
8.1 Chevy 0w40
- Thread starter chilson450
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Since you have a gas engine, yes they would be fine to use
I would not worry about any of that. The big blocks like a bit thicker oil (your 40 at op temp is great).
FOI (For OUR Information): How many qts. of oil does the 8.1's belly hold?
Originally Posted By: Kira
FOI (For OUR Information): How many qts. of oil does the 8.1's belly hold?
7
OP you'll be fine to use the 0w40, I've used that and 0w30 in my 7.4 3500
FOI (For OUR Information): How many qts. of oil does the 8.1's belly hold?
7
OP you'll be fine to use the 0w40, I've used that and 0w30 in my 7.4 3500
284,000 miles on my 7.4 (454) ... run on pretty much the least expensive 15w40 money can buy all its life.
Back in the 70's and 80's we didn't have 5w30 for the winter, 10w30 was usually it.
North Dakota winters are just as cold as Northern Michigan
Back in the 70's and 80's we didn't have 5w30 for the winter, 10w30 was usually it.
North Dakota winters are just as cold as Northern Michigan
I'm running 10W-40 Castrol High Mileage in my 1998 7.4L. With this colder weather I do get some tapping on startup and it doesn't start as quick but once it warms up, it's fine.
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