projectSHO89:
DHMag:
netviper:
hmmm
90k old engine AMSoil 0w-30 hot oil pressure @ 2k is 37psi for me. not too shabby
my engine is just about to turn 130K, when it does, im gonna park it and overhaul the heads. im thinking of switching to 10w30 because of the immense heat were having down here in Texas at the time. gawd, if i were to put 0w30 in there, i dont think id have very good oil pressure at all.
The first number of the SAE viscosity index is for COLD oil. After the engine reaches operating temperature, the second number of the VII is what is important.
OW30 would still have the same viscosity as SAE 30 at operating temps, same as 5W30 or 10W30.
FWIW, Ford suggests 5W30 for the SHO engines as being adequate for normal service usage in all climates. They came out with a TSB back in 98 or so about it.
Steve