What's the best oil to use in my g37s

 

Synthetic.

 

Brand wise I was leaning towards penzoil

 

You're new, but people around here favor the search function heavily to dig up old threads. This is a sticky where members debate their favorite brands.

https://www.myg37.com/forums/general...il-thread.html

From the poll, Mobil 1 synthetic seems to be the team favorite, that's what I use.

 

Thanks I'll go with that

 

There are going to be a million different opinions on this but I've been using Mobil 1 5w-30 synthetic and sending samples in to Blackstone labs. I've running 7000 miles between change and each time the've told me the oil looks fine to go farther but oil is cheap enough 7k seems far enough.

 

Mobil 1 or Penzoil Platinum full synthetics are the go to usually.

 

always used eneos oil in my old g and now current g. I love it, but any oil 5w30 will do just depends on how often you want to change it.

 

if you aren't tracking or racing everyday...

it really doesnt matter.

My dad has a 1992 Chevy Silverado with 250K+ miles.
He has always used the cheapest oil.

No engine problems

I myself usually buy whats on sale in the $30-$40 range