I use Mobil Delvac 1 5W40 in my 1999 GTS. I also use this oil in my turbo diesel Hummer. It is an oil engineered for diesels and contains more additives for stability. These additives make for a very stable gasoline engine oil, providing superior protection IMHO.
Hello Guys,
This is my first post and I have been lurking on this forum for some time. I purchased a 1999 GTS black/silver stripes 5k miles mint cond. :2tu: in Dec 03. Just want to share my experiences with you as I have gotten a wealth of info from you guys.
1) Purchased 3"...
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