That 'old wives tale' comes from Ed Peters one of Dodge Brothers head engineers. I've also heard countless Master Technicians say the same thing. All I know is when I pour the 4 1/2 quarts of oil of synthetic into the funnel it takes twice as long as conventional oil. Another thing to consider is PSI of pressure that older engines run vs newer. Remember the warm up period car manufacturers use to recommend? That was so oil would have time to get to the head for proper lubrication before heading off down the road. Know why they dont recommend 'warm up' anymore? Because new cars have a 58-60 psi rating on the oil. It is their literally instantly.
Anywho, its true that synthetic oils dont break down over time but they do get dirty just as you have stated. Which means, you cant just stick it in there and expect it to last forever.
My M1 0W40 Review:
I drained the oil and removed the filter after it had been sitting for a few days. Not normally recomended but I wanted to get all the 10W30 out of there. Ran oil through the filter housing to push all the old oil out. This usually gets a good 1/4-1/2 a quart extra out. Primed the oil filter (I should get a oil primer, I know) and added the oil. I was a bit concerned about changing it cold with all the oil drained down and blowing out the oil galleys. Well oil pressure came fast, hardly any rattle, actually, I don't recall hearing any. I was a bit worried the engine would not like a 0W when it was cold, the stuff is a lot thinner than 10W even at 80*. 0W was unheard of back in 1988.... it always seems to clatter some even with 10W, but with 0W NONE AT ALL. Checked level, took it for a drive. Runs real good. It has always had a high rpm rattle also, where you can really hear the engine, and it seems like it has lost the rattle. Oil pressure seems to stay stable. So far, so good. Unless I spin a berring or something soon, I'd have to say this is good stuff.
Link?
I run conventional oils. I haven't bought into the "if you give a damn about your car you run synthetic only" craze. To me it's kinda like running 93 octane only, or platnium plugs. People tend to buy into the hype rather than think about their realistic needs.
Nothing wrong with conventional oils. If you do regular oil changes, it's perfectly fine to use. I only use synthetic fills if the factory fill was synthetic from day 1. In that case, i won't change to conventional. But if i get a car with 50K miles on conventional, i won't change to synthetic.
My mustang has conventional in it...and i run 87 octane too.
I've been pretty good at regular changed. I do 4000 miles like clockwork. That's 1 month of driving on my DD...so i do 12 oil changes per year.
My Mustang, sadly, has only driven 6.7 miles since last November. Yes...I am a terrible stang owner
Haha, damn. DO you have a long commute, or do you just travel for work a lot?
Thin oil flows with less resistance, so it takes less power away from your crankshaft, so more power to the wheels.
That's why car companies are going to this 20 weight oil. Thick oil protects better.
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