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Old 07-17-2010, 08:40 PM   #2 (permalink)
PapoZalsa
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Quote:
Originally Posted by sonic370 View Post
does anyone know when or why all manufacturer's went to 5w30 oil.
i grew up on 10w30 here in Texas.does it really make that much of a difference
I grew up with 10W40 in PR back in the 70 & 80s. :dunno:

However that will depend on the new technology and design of that particular engine.
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