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    Ash content in oil; Liqui Moly oil.

    Liqui Moly has a 507 oil for TDI that has low ash content for Diesel engines for VW cars. Yet for gasoline engines, they recommend that i use 505 oil in VW engine. And the higher ash count vs 507 oil, more ash acts as lubricant in gasoline engine in VW. Is this true? Does higher ash content...
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