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Author Topic: Changing from semi synthetic to fully synthetic engine oil?  (Read 1014 times)

Offline gixerthrasher

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Changing from semi synthetic to fully synthetic engine oil?
« on: 25 March 2009, 20:39 »
I'm going to change to a fully synthetic 5w-40 engine oil for a bit more protection..
I've always used the GSF semi 15w-40, but can anyone tell me if it's gonna need flushing right out before the new stuff goes in, please?  :undecided:
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Offline sidecarphil

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Re: Changing from semi synthetic to fully synthetic engine oil?
« Reply #1 on: 25 March 2009, 20:53 »
think 5w30 is too thin

makes my oil light and buzzer come on !!!!!!!!

stick with what VW used they spent millions (well thousands) on engine development , think they know what they were on about
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