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synthetic oil leaks

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Old 10-17-2006, 10:29 PM
  #16  
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Originally Posted by archemedes
the weight is too much for the pump to pump well, it's too heavy to cling to bearing surfaces, the film thickness is off meaning your bearings have either too big or too little a gap
then why does everyone recommend using 10W-40 for high mileage engines?
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Old 10-17-2006, 11:01 PM
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okie dokie. i really dont think the differences in the numbers matters that much. w.e is in stock at vatozone is what i buy. pretty much always valvoline. i cant see the weights making THAT much of a different to the point the bearings fail cause it wont stay on them. when my bottom end blows up, ill let you know.
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Old 10-19-2006, 11:53 PM
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Originally Posted by NoRiceInside
then why does everyone recommend using 10W-40 for high mileage engines?
nobody does anymore (it was ok on engines made prior to I think '82) since the bearing clearances weren't as tight, but now it's not good (GM voids your engine warranty if you tell them you ever put it in your car)
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