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

Asked by 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.

3 Answers

56,665

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

90,655

That depends on if it is convential or synthetic oil and where you reside, if it is synthetic I doubt you will notice much difference, but convential a could give you a lower oil pressure reading when warmed up, so keep the RPM's down and avoid engines loads, just to be on the safe side you might consider adding a quart of Power Punch to the oil, that should make it last till the next scheduled oil change and you won't loose the oil already in there. HTH

21,755

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

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 7,832 nationwide Sierra 1500 listings starting at $1,800.

Postal Code:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,920
#2 John Saffrahn
John Saffrahn
Reputation 3,490
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,070
View All

Related Models For Sale

Used Chevrolet Silverado 1500
105 Great Deals out of 6,556 listings starting at $2,339
Used Ford F-150
275 Great Deals out of 7,965 listings starting at $1,800
Used Dodge Ram 1500
44 Great Deals out of 443 listings starting at $2,500
Used Toyota Tacoma
20 Great Deals out of 740 listings starting at $4,999
Used GMC Yukon
7 Great Deals out of 671 listings starting at $6,000
Used Chevrolet Tahoe
580 listings starting at $6,990
Used Ford F-250 Super Duty
14 Great Deals out of 625 listings starting at $4,500
Used Chevrolet Camaro
1,062 listings starting at $13,999
Used GMC Sierra 2500
10 listings starting at $9,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
7 Great Deals out of 5,871 listings starting at $3,750
2016 GMC Sierra 1500 For Sale
5 Great Deals out of 158 listings starting at $23,995
2015 GMC Sierra 1500 For Sale
30 Great Deals out of 413 listings starting at $21,996
2014 GMC Sierra 1500 For Sale
19 Great Deals out of 474 listings starting at $18,888
2013 GMC Sierra 1500 For Sale
15 Great Deals out of 282 listings starting at $15,900