yekta

iTrader: (8)

I ve just bought a 99 z28 and I have no idea for the oil! Should I go with the best like mobile1 0W-40

ACW

Here's some oil discussions...
https://ls1tech.com/forums/generation-iii-internal-engine/181274-switched-mobil-1-0-w40-now-less-oil-pressure-higher-temps.html
https://ls1tech.com/forums/generation-iii-internal-engine/141531-what-engine-oil-use.html
https://ls1tech.com/forums/generation-iii-internal-engine/2019-what-weight-oil-you-using.html
https://ls1tech.com/forums/general-maintenance-repairs/635-why-engine-oil-causes-noise.html
https://ls1tech.com/forums/generation-iii-internal-engine/66326-oil-filter.html

This would probably be better off in the Internal Engine forum

KATN SS

German made Castrol Syntec 0w30

nick3205

I got with Mobile One 5w30

yekta

iTrader: (8)

I really didnt get it I m confused!!! Everybodys saying different things
What s recommended?

ACW

That tends to be the case... people usually have lots of different opinions on oil

yekta

iTrader: (8)

hmm tell me what is the best for my engine,in your opinion?

2000WhiteTA

I use Mobile 1 10W30 if that helps. I have used it since I bought the car with 14,000 miles and now it has 59,000 miles. I do not know if it is the best but that is what I like.

Orange Krush

I use to use the Mobil-1 5-30 when I first got my Z brand new, (I believe that's what GM recommened for the car) as my nitrous addiciton got worse I switched to 10-40, and right now for the winter I am using the 0-40 U are asking about!

I can tell U the oil consumption problem most people complained about were apparent to me when I was using the 5-30 in the early days, about a quart every 1500 miles for me, but since switching to the 10-40 for the summer, and 0-40 for the winter oil consumption is non-exsistent for me, and this is on a bone stock, 48,000 mile motor, with over 150 chasis dyno pulls, and 500+ 1320' passes, all with the original from the factory PCV valve still in place.