1994 Chevrolet Silverado 4X4 177,000 miles....... once it warmed up the oil
pressure would always drop down some, so I figured maybe the Lucas oil would
help keep the pressure up (as they claim) and about 10 miles after adding
the pressure dropped to zero and the motor started chattering because of the
lack of oil getting pumped. Maybe the stuff was to thick for the tired old
motor. Lucky I was close to the house and made it home before it locked
up.... I started it back up later and the pressure went back up but the
motor is still making awful noise still like it has no oil.
Who knows...? The question should be, "why do so many folks
worry because their oil pressure drops down some"? Unless
you can confirm that your oil pressure is dropping down to
some very low reading, why worry about it? The engine wasn't
noisy before this, was it? If not, you would have been better
to leave well enough alone. All the oil thickners in the world
won't help a terminally ill engine.
My boses father had this syndrom. He also had an engine that would use
oil. So he figured that he instead of topping it up with oil he topped
it up with STP (the stuff like honey) that it wouldn't burn so much.
My boss said he was in the car when it took it's final terminal
breath, and that everything under the hood was glowing. When they tore
the engine apart - the garage said "gunk wasn't even the word for it."
I believe it had about 150K on it and had never had the oil changed in
it's life. Just after the new engine was dropped in, the tranny
started slippin. So he added some magic tranny fixer and forgot about
it. I think something like 10K later (directions say to remove after
500miles or so I believe) that puked it's guts out.... hehe
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