Which oil should I use

Tiny
DIEGOESOLORZANO
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 4.3L
  • V6
  • RWD
  • AUTOMATIC
  • 120,000 MILES
Greetings. I currently own the vehicle listed above from Venezuela. It was supposed to use 5w30 engine oil according to owner´s manual, however the previous owner was using 20w50 oil and all of the mechanics here recommend me it. The engine has 120,000 miles. Which oil should I use? Should I continue using 20w50 engine oil or should I change back to factory 5w30 engine oil? Consider the weather in Venezuela is tropical, we have a standard temperature of 27~30°C. Thanks
Thursday, September 7th, 2017 AT 10:03 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 14,543 POSTS
Well it made it this far on the 20W50 and it is available.

I run 10W30 synthetic in my 2002 Blazer and it has over 180,000 miles on it, but I am no where near the tropics. My current outdoor temperature is 4°C.
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Friday, September 8th, 2017 AT 12:23 AM

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