Question about 2004 Mazda RX-8

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Whiteish gunk on oil dipstick

When i had my last oil change only 1500 miles ago the guy at the shop said there was a white foam on the dipstick, i didnt think nothing of it just figured he was trying to sell some additive. i check my oil yesterday and the foamy stuff was thick and all over the dipstick. The car runs great no loss of power or anything. Any suggestions of what it could be? thanks, john

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  • john mcspadden Jan 22, 2009

    Thanks for replying so fast... Thats gonna cost alot isnt it?

  • john mcspadden Jan 23, 2009

    do you think the person who owned the car before me could have been using synthetic oil? I have been using conventional oil the 2 times I have changed the oil. I havent had to add water so I think the head gasket is good. What do you think? Thanks for your help, jon

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Wankel Rotary engine guys no headers or gaskets

This milky substance does not affect engine performance or any other functions of the vehicle. During cold weather, moisture contained in blow-by gases (exhaust , oil, fuel, water vapor) is cooled by the intermediate housing wall and condenses due to difference in temperature. A chemical reaction between the moisture reacts and the engine oil in the intermediate housing will yield the milky fluid. This fluid then eventually dissipates
as the engine warms up to full operating temperature.

The milky fluid does not affect the quality of the engine oil and therefore the engine performance is not affected either. Mazda has verified that the amount of moisture in the oil is within the acceptable standard for motor oils commonly found in the market.

However, you should verify that the coolant reservoir is full and that there is no sign of engine coolant leakage.

You can also go to you Mazda dealer and ask for a new oil level gauge tube plastic insert which has been developed as a countermeasure to keep the milky substance off of the dipstick (however, the substance will still be in there- it's a cosmetic fix only).

Hope this helps

Posted on Mar 24, 2009

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There is no real crankcase in this engine and the gung on the stick is normal condensation do to short runs and poor venting.Can not be fixed

Posted on Mar 30, 2009

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Bad head gasket. Good luck contact if you need more help.

Posted on Jan 22, 2009

  • O Mclean Jan 22, 2009

    Yeah some what, If the head isnnt craked/damage it will Not be too bad.. estimate between $800-2000 Good luck> sorry to be the bearer of BAD NEWS

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