Originally Posted by 09blackbeauty
A $10 dollar quart of oil gets dirty just as fast as a $3 dollar quart.
Thats why you have an oil filter.
Synthetic oil holds up to temeprature extremes far better than conventional oil. Doesn't break down as readily. Provides better lubrication and wear protection. Good synthetic oil will hold particles upto 5 micron, size that wont cause wear, held in suspension in synthetic oil. A good 5-10 micron filter will take care of the rest. Sometimes after switching to synthetic oil, it will appear dirtier sooner because it may have more detergents and or dispersants and actually be cleaning the crud and sludge left behind by your conventional oil. I dunno spend 20-30-40-50-60k on a truck and cheapout on the oil. Regular oil changes are the single most important thing you can do for the life of your engine. With synthetic oil I regularly go 10k-12k + km's between oil changes. I sure as heck wouldnt do that with conventional oil.
Why do you think that Fords service intervals and service monitors go 12k kms? Because the spec they require for my 2011 5.0 is at least a semi- synthetic oil to meet that spec. A cam shaft spins 2wice the speed of your crankshaft. Dual cams on top of your engine will endure more wear on a cold start than driving a hot engine across the country. Regular multi grade oil can take as long as 10 minutes, in some cases, to reach the top of your motor. When the temp hits -30 up here, and it does, Ive seen many a car come into the shop with siezed camshafts in the head.
Thats my story and I am stickin to it.