How will 5w-20 motor oil affect or what will it do to my 1998 gmc sierra z71?

Asked by Jarrettloya Dec 12, 2015 at 10:01 PM about the 1998 GMC Sierra 1500

Question type: Maintenance & Repair

Didnt realize i had changed my oil with 5w-20
instead of what its suppose to have which is 5w-
30 untill i had already poured almost all of it in.

2 Answers

F_O_R answered 8 years ago

Possibly an increase in oil consumption. Top it off with 5W-30 if you need to.

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jamnblues answered 8 years ago

It is winter and if it is cold where you are it should be ok- depending on the condition of your tired old engine-

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