Hi Richard:
You may have a problem with wear in the engine. The pearlescence is caused
by metal particles. This could point to imminent bearing failure or
someother area where wear is accelerated..
John McEwen
>Hi All,
>
>When changing the oil in my MGB 18GB ('67) engine, I notice that the color
>of the oil is a bit different from that of modern fuel injected cars. The
>oil actually seems to have a slightly pearlescent hue to it and a stronger
>smell of gasoline than oil from my fuel injected car.
>
>My spark plugs look fine (not black and sooty from an overly rich mixture)
>and I don't drive with the choke engaged longer than needed. The carbs are
>stock SU's and the engine was rebuilt about 10,000 miles ago with .020 over
>pistons, new stock cam, etc, etc. My oil changes are at about 2,000 mile
>intervals. The engine passes 1970 emmission standards and runs great.
>
>Is this oil condition normal for an 1960's vintage engine design with SU
>carbs, or do I have a problem with gasoline contamination.
>
>Any thoughts or ideas appreciated. Thanks,
>
>Rich
>1970 MGB roadster
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