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Originally Posted by JGalt
A friend just received the following response from Ashland (Valvoline) regarding the new oil formulations:
The oil industry per ILSAC had to only decrease the levels of ZDDP (Zinc) in certain viscosity to meet new emission standards.
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OK, which ones?
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The ILSAC rated oils still have an average of .085 levels of zinc. Testing has shown on standard OEM set ups that used mild camshafts will still get plenty of protection from the new rated oils. )
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Current data appears to support 1200+ ppm levels (0.12%) for our air cooled cars.
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There is an exception when it comes to extreme aftermarket applications. If you have a high performance solid lifter set up with an aggressive cam then you will need to use a quality Racing Oil or Fleet Oil for break in and normal usage. These oils have an increased level of Zinc that will range from .14 to .16 and will provide plenty of protection.
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Yep, like a 911.
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The consensus in the industry is that the current chemical limits of the GF-4/SM category are still sufficient to protect all "street" engines, including older flat tappet roller engines.
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Who formed this consesus? Old hot rodders? People who only own cars 5 years or newer?
I thought you had a flat tappet OR a roller tappet, What is a "flat tappet roller engine?"
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The engine tests required for a GF-4/SM product is just as severe as the older, higher ZDDP allowed category. For the special applications (aggressive cams, high HP racing motors, etc) where the customer needs more ZDDP protection, our NON-GF-4 products still contain the higher levels (such as VR-1 and "not street legal" racing).
To: VWEBMAIL@Ashland
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So we do need the higher levels then!
Confused? I am (but maybe I am handicapped since I have an Engineering degree).
What a bunch of double talk....