What weight oil for a 1990 Chevy C1500 V6?

[gradymotorco]

I just bought a 90 Cheyenne C1500, (see post on the maintenance forum), and was wondering what weight oil to run in it? I was thinking something like a 10W30 Pennzoil, or maybe a store brand with prices being what they are.

Thanks, Dave

 

[rg200amp]

10w30 Pennzoil will work great.

Whatever brand you choose, I would stick to the 10w30 oil weight.

 

[Steve S]

I would use a high mile oil .Usually HM oils are formulated toward the thicker range of 30 wt and can have higher levels of antiwear additives which is good.

 

[umungus1122]

I would vote for pennzoil 5w-30 winter, 10w-30 summer. Right now I am about to change my GMC with a 305 over to Castrol 5w-20 for the winter, but I drive lightly and don't tow.

 

[WishIhadatruck]

In NC I'd probably stick with the 10W-30 year round.

 

[FrankN4]

If that is the 4.3 V6, I would go with a 10W-40 high mileage year round.