OIL Question
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Joined: Aug 2001
Posts: 5,364
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From: King George VA
Originally Posted by gordonb50
Only what's recommended in your owner's manual - Mobil 1....
Here's my recommendation:
AMSOIL Series 2000 0w30
AMSOIL SAE Synthetic 5w30
Both of these meet GM Standard 4718M.
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AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
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I only use Mobil 1. There are others out there that are good too.
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Joined: May 2001
Posts: 15,318
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From: Guelph, Ontario
I have seen incredibly low wear numbers in my oil analysis reports with the use of German made Castrol Syntec 0w30. I've yet to see another oil analysis report from an LS1 or LS6 powered vehicle which looks as good as the reports I get. Mobil 1 5w30 just doesn't have as good of an HTHS (high temperature high stress) number as this oil does, so when you drive hard, the German Castrol is going to protect things so much better. The proof is in the reports!
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Joined: Aug 2001
Posts: 5,364
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From: King George VA
Originally Posted by ztheusa
GM recommendes MOBILE 1 oil. That's why the Mobile 1 LOGO on the oil filler cap!
PATMANs oil analysis indicates there are better oils on the market. I just recently had another forum member (LS1 C5) who had been running German Castrol give AMSOIL Series 2000 0w30 a try. After running the oil for 3281 miles, he submitted the oil to Blackstone labs. The results:
PROPERTIES
ALUMINUM 2
CHROMIUM 1
IRON 6
COPPER 13
LEAD 3
TIN 1
MOLYBDENUM 4
NICKEL 0
MANGANESE 0
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 38
SILICON 10
SODIUM 1
CALCIUM 2410
MAGNESIUM 795
PHOSPHORUS 1012
ZINC 1144
BARIUM 0
TBN 7.3 (was 11.9 virgin)
Vis 64.5 (SUS) (was 63.4 virgin)
Flashpoint 400
The top metals are wear products (aluminum, iron, etc). Calcium and Magnesium are detergents, Zinc and Phosphorus are anti-wear additives.