1991 Cherolet work truck 4.3 L V6 engine Best motor oil weight?

Asked by Jul 01, 2017 at 05:25 PM about the 1991 Chevrolet C/K 1500 RWD

Question type: Maintenance & Repair

I have been using 10-30 but the truck runs slightly rougher the past couple of
years. Interested in recommendations for the best motor oil weight. Original
engine, love this truck.

3 Answers

86,225

The oil weight has nothing to do with rough running, just change it every 3,000 miles. Try tuning it up.

1 of 1 people found this helpful.

I probably shouldn't have mentioned rough running. It is very slight. I am a stickler about changing the oil, which is probably why the truck is doing so well at 26.5 years. I would still like to hear about other people's experiences with oil weight. As far as a tune-up, I plan to it when it is due. Maybe a little sooner.

86,225

If the engine is not using oil I would stick with what you are using. If it is you could try 10W-40.

1 of 1 people found this helpful.

Your Answer

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 11 nationwide C/K 1500 listings and the tools to find you a great deal.

Postal Code:

Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
    Reputation
    3,840
  • #2
    John Saffrahn
    Reputation
    2,650
  • #3
    Rowefast
    Reputation
    2,210
View All

Related Models For Sale

Used GMC Sierra 1500
253 Great Deals out of 10,408 listings starting at $1,775
Used Ford F-150
639 Great Deals out of 10,010 listings starting at $2,900
Used Chevrolet Camaro
928 listings starting at $13,495
Used Chevrolet S-10
10 listings starting at $1,750

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.