BajaRunner

Um... gravity will always pull oil down to the drainpan no matter what... I dont think it matters if its syn or not. Maybe the dyno stuff is thicker in some senses and the goop that accumulates over time may be thought to be a better lube?

I have developed a small oil leak coming from what looks to be a front seal from switching to Mobil 1. I did an Amsoil oil flush clean, and I think it washed out all the goop/debris/buildup from dyno oil and now the new synthetic can seep out slowly from an old seal.

MTL_4runner

Yep.....both will leave a film which should be sufficient for startup. The bigger factor is to make sure you have an oil filter with an anti drainback valve (with the OEM Toyota ones do have). This makes sure oil goes where it needs to more quickly after sitting and hopefully causes less wear and no "bucket of bolts" sounds at startup.

Beartracker

Been running Mobile 1 5w-30 for a while now in my 01 2.7 Tacoma , change it every 10,000 miles. No problems yet and I do some hard mountain driving. When I start it up it's as quiet as baby sleeping and idles like a kitty purring,Lol.

4RUNN!N

Since I purchased my 4R about 9K miles ago, it was sold to me with a fresh oil change but wasn't sure what type of oil was put into the engine, but I'm thinking about changing it to M1 5W-30 Syn just like I did in my previous car, but the weird thing is that even after 9K daily driving miles and maybe 2 times a month going on a road trip and some off-road advetures, the oil is still not dingy and black, instead its a little murky but still the brownish transparent color. Would it be a waste to change the oil now?

WATRD

The color, smell, feel and taste of oil have nothing to do with whether it is suitable for continued use. Either change it on a schedule or have it analyzed, but don't fool yourself into thinking you can distinguish good oil from bad simply by looking at it. It's not mayonaise.

spindleshanks

Nope, Bruce has got it correct. All synthetic oils come from petroleum products. The desirable qualities of conventional oil are maximized through additives and engineering to make a synthetic.

WATRD

Prove it.

Everything I see says they are made from purely synthetic base stocks.

...and many more...

ttus

Mobil 1

rugerm44

The thing that tears me up is how it went up in price.Its man made right, so why did it sky rocket when dino oil and gas went up.Go figure

ttus

Been using Mobil1 in all my cars and truck.

04 CV
04 Tacoma
96 TC
97 Chev. 4x4 duallie 454

blzorro

Check this out--- http://synlube.com/prod01.htm You dont have to change your oil ever again this stuff was used on our mission to mars!