I had to replace a leaking valve cover on my 96 this weekend, and was
SHOCKED to find a TON of sludge in the valvetrain!
This engine was COMPLETELY rebuilt 50,000 miles ago, and has had the
oil changed at least every 3,000 miles.
The first few oil changes were Pennzoil, but then I switched to
Valvoline since then. it's about 3 yrs old now.
Is the parrafin content in Pennzoil really that intense that it causes
the buildup? or are there other factors?
Coincidentally, I had to replace the VC gasket on my 95 F150, which
used to be a company work truck. it has 120k on the clock, and always
had the cheapest crap oil the company could find put in.... IT looks
like it's had Mobil 1 in it for a month. NO SLUDGE at all!
- posted 15 years ago