1997 Chevy Blazer Oil Top off

Tiny
DELANA
  • MEMBER
  • 1997 CHEVROLET BLAZER
1997 Chevy Blazer Four Wheel Drive Automatic

Hi, my oil cap says to use sae 5w-30. But I noticed that my step-dad used 10w-30, during the summer. I am due for an oil change but have a 3 wk wait for my (honest) mechanic. Which is why the wait, he's a rarity.I need some oil in it. So I was thinking I need to top it off. Is it ok to put the recommended sae 5w-30 on top of the 10w-30, since it's getting colder?
Also, does the lack of sae on the already used motor oil mean anything to me, pose a problem since the cap specifies sae?
Monday, November 10th, 2008 AT 9:12 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

I would use the 10w-30 if you use the lighter oil in an older engine you may find slightly lower oil pressure and it may start to burn a bit as well.

Mark (mhpautos)
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Tuesday, November 11th, 2008 AT 12:00 AM

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