2007-02-07 06:32:00 · 11 answers · asked by Roger 2 in Cars & Transportation ➔ Maintenance & Repairs
it's safe to put 20/50...
2007-02-07 06:48:27 · answer #1 · answered by sammy 5 · 0⤊ 0⤋
Chevy Silverado Oil
2017-01-01 07:14:26 · answer #2 · answered by maragno 4 · 0⤊ 0⤋
I know the newer cars and trucks have much smaller holes in the heads than the old ones so they recommend the oils like 5w-30 but an old truck like yours should probably have at least a 30 weight oil and It won't hurt it to put in 40 or 50 weight oil. If the motor has a lot of miles on it, the high mileage oil will help keep it from wearing out sooner (they put a little bit of brake fluid in it to make the seals expand). The most important thing is to change it on a regular basis. Good Luck!
2016-03-29 09:43:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I had a 93 Silverado with a 350 engine. I was running 20/50 in it from 180k miles until I replaced the engine at 326,500 miles. I'd try running straight 30 weight oil first then if if smokes any at all, I would go to 20/50. The main thing is, keep the oil changed regularly. I also used Slick 50 engine treatment in it every 50k miles.
2007-02-07 06:36:18 · answer #4 · answered by Big Rick 6 · 0⤊ 0⤋
The guy that used slick 50 probably would have gotten 100-200 thousand extra miles out of that engine not using that junk.....
20w-50.... are you leaking a lot of oil? burning a lot of oil? If no..... stick to 5w-30 and 10w-30..... 20w-50, I reserve that oil for a beater car.... something I wouldn't care die or something I want to get rid of soon....
2007-02-08 18:39:42 · answer #5 · answered by 572ci. 5 · 0⤊ 0⤋
Depending on the mileage of the truck 20w50 may be too thick. The norm is 10w30. If it has over 60,000 you might go with a 10w40 oil, but 20w50 is probably too thick.
2007-02-07 06:59:35 · answer #6 · answered by Polamalu is God 5 · 0⤊ 0⤋
use the owners manual, it a wealth of information, if no book call a gmc dealer , ask , mark it on the valve cover. it might be listed on the dip stick.
2007-02-07 06:41:24 · answer #7 · answered by greghemmert 3 · 0⤊ 0⤋
I would suggest you ask an auto repair facility
they give advice which is also free
2007-02-07 06:41:43 · answer #8 · answered by Anonymous · 0⤊ 0⤋
10W30 will probably be fine. 20/50 sounds pretty viscous to me.
2007-02-07 06:35:45 · answer #9 · answered by kdog 4 · 0⤊ 0⤋
Mobil 1 is the best...
2007-02-07 06:44:42 · answer #10 · answered by Jeeper 777 1 · 0⤊ 0⤋