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1998 Cobra Engine
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[QUOTE]Originally posted by JohnB: [QB] 10w30 is too much for that setup. 5w20 or 30 is what they need. The higher viscosity oil can't flow as easily through the heads, so it sits longer in them...leaking down valve guides...burning in cylinders. Also, it will be sucked into the intake through the PCV system, as it closer to the valve being in the head. I'm willing to bet your IMRC's are coated in burnt oil, your lower intake is full of oil, and the back of the throttle body has oil on it as well. This is where all the oil went. As for what to look for...check the #6,7, and 8 rods. One of them has possibly has a spun rod bearing. [/QB][/QUOTE]
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