Nuke

A fine choice. Be sure to use the M1 filter or any of the other high mileage rated filters. I use M1 in my SUV's which are my tow vehicles and still change the oil at 10k miles. Two of those SUV's were sold with 205,000 and 152,000 miles on them and they ran like they were just rolled off the showroom floor.

mariusvt

I'm a big fan of the Pennzoil Ultra and it's all I'll be using in mine once I dump the factory fill after I get some miles on it.

PNYXPRESS

I use mobil 1 synthetic. I change the filter every 5k miles with a motorcraft one and the oil every 10k miles. Only reason I dont run it longer is because it takes me around 2 years to go 10k miles and I dont want to leave the oil in there much longer than that.

yellowneck86

Been using mobil 1 extended performance on both my mustangs since I've owned them. I used to change every 3k but I'm now at every 5k

Nuke

If we lived near one another, I'd take your M1 with only 5k miles on it and use it in my lawn equipment. I only change mine at 10k miles in the Stang because of the TIME it's been in there and in the SUV because of severe duty (towing). M1 with 5k on it is a waste to dispose of.

yellowneck86

I'm just a lil paranoid when it comes to maintenance. I checked my oil last week and noticed it was yellowish brown and at approximately 3 quarts. Reading taco Bill"s write up seems to make me want to change it more than usual.

Nuke

I'm sorry, but black oil is NO indication of how much "life" remains in an oil. Many an oil analysis a good 15,000 to 20,000 miles beyond the time that an oil was black still showed that the oil was fully capable to protect. Granted, nobody LIKES to see black oil because of the folklore but don't change your oil based on a visual.

157dB

Unless the oil has a thermal breakdown, the oil never 'goes bad'.
It is literally just contaminated from the by-products of the combustion engine.
If the contaminates can be removed, and the oil has not been subjected
to thermal breakdown, then the oil is still oil and has not lost its lubrication
properties...

Same goes for synthetics?????

PNYXPRESS

This is why you change the filter regularly

157dB

And use the BEST and most EXPENSIVE filter out there.