What do you guys trust?

[wstanek]

dosen't that have the viscosity of water though? 0w-30

[mirage83]

Originally Posted by wstanek

dosen't that have the viscosity of water though? 0w-30

Nope. At normal operating temperature it's a 30w oil, no different than any other 30w. But when the engine is cold you WANT the oil thin to circulate better even at those lower temperatures, which is why the 0w is great for tight tolerance engines (like the 7M) when you first crank them. Less friction and wear at cooler, startup temps, yet a good normal ops temp viscosity as well.

[btwilson86]

Originally Posted by wstanek

dosen't that have the viscosity of water though? 0w-30

I'd suggest your read the article Green7MGTE posted in this thread

[Green7mgte]

yea takes awhile to get through it but its defiantly educational. as for what type of oil i use.. whatever is on sale.. till my rebuild, if i ever get around to putting these parts on. lol

[cre]

Pennzoil Platinum 5W-30. I change my oil filter 3x more often than I change my oil.

[Semper_Fi]

I wonder why people put synthetic in their cars...
Synthetic oils were used mostly only in airliners to keep the oil from freezing in the frigid temperature they mostly fly in. Spoken to a few other mechanics about using synthetic oils, and they mostly all have said "Why pay double for overkill..."

Not bagging on anyone, just wondering why pay 14$ a quart for oil...

[btwilson86]

Originally Posted by Semper_Fi

I wonder why people put synthetic in their cars...

I ran 0W-20 Royal Purple engine oil in my former 87 7MGTE. I had not experienced any significant loss of pressure, and in turn had a cooler, better performing engine. I switched from 5W-30 Mobil Clean 5000 conventional oil.

My reasonings for switching:

1: Extended oil life and better protection because a Synthetic oil's structure does not break down from normal use
2: Ability to reach thinner viscosity at startup, therefore providing better flow and lubrication for the engine during a traditionally high-wear period
3: *Most* Synthetic oils have been proven to adhere better to metal surfaces versus a mineral-based conventional oil, once again providing better lubrication (people may argue this point, as I have no data at hand to prove this; it's just something I've read a couple of times over the years)
4: Increased lubrication results in less friction. My engine now runs smoother, quieter, and is much more responsive vs. conventional oils I have run in my Supra.

With that said, there is a lot of bad information about what oil to run, how different oils work, and what's best for what scenario. Most people will believe what they believe for their own reasons, the only way to know for sure is EXTENSIVE research and experimentation.

[cre]

I'm with BT.... hell, the only reason conventional oils are able to provide even half the wear and thermal characteristics its because of all the synthetic additives and unnatural altercation they put it through. you really can't get the goodol' oil you used to... and for a good reason, comparatively it sucked!

[btwilson86]

Originally Posted by btwilson86

I ran 0W-20 Royal Purple engine oil

I would also say 0W-30 is acceptable