M20 Turbo. Which oil to use?

[varg]

I haven't done a used oil analysis on the M20, yet, but I have been using rotella in my turbo cars for years. It's pretty useless and anecdotal information, I know, but Rotella works for me based on the reading I've done and the experiences I've read about/had. The stuff isn't expensive, and I don't bother with synthetics since I don't track the car and keep short oil change intervals (4-5,000mi). If I weren't so cheap I'd probably buy synthetic oil but I'd make sure to pick one with a decently high ZDDP concentration, because old flat tappet engine.

[ForcedFirebird]

You can put whatever oil you want without flushing.

There's one HUGE difference between synthetic, and that's syn has the ability to hold sheer and keep higher viscosity at higher temps.

We had success using M1 15-50, but have switched to the LiquiMoly Race Tech 10-60. We saw an increase in idle oil pressure in summer after a long stint, or in a turbo cars that has been beat on. M1 is at Walmart for like $26 an oil change, the LiquiMoly is not quite double if you shop around.

[SGT StudMuffiin]

I use Motul 10w40 synthetic


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[ak-]

I use Rotella for the same reasons Varg mentioned in my turbo car, but going to be lapping it soon at the track and I'm undecided on what I should change over to.

At autocross/canyons my oil temp doesn't go over 210* when running full tilt (thermostat big oil cooler @ the grille).

[fergie]

I run 10w-60 Castrol with no oil cooler on my turbo m20 and have no oil consumption. Ive been running it this way for the past 4-5k

[LowR3V'in]

vr1 because it says high zinc and racing oil on the bottle.

you don't see mobile or whatever having shit like that.
I change it every 3k.

[ForcedFirebird]

you don't see mobile or whatever having shit like that.

M1 15w50 has 1300ppm ZDDP and m1 0w30 has 1100ppm. Both have more than enough zinc for an m20.

[LowR3V'in]

yeah but it doesn't saaay high zinc and such.

[SGT StudMuffiin]

I use Motul 10w40


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[ForcedFirebird]

yeah but it doesn't saaay high zinc and such.

Mobil 1 15W-50 contains extra anti-wear protection (zinc) for high performance engines

[LowR3V'in]

it's too buried in the find print.

[Nitro Nick]

Hahaha great convo guys, and a decent source of info. I had initially used the synthetic 20-50 royal purple. Its expensive but i don't drive that much and its worked well so far. Still contemplating changing over to non synthetic in the spring when I drive a lot more.

ZINC FTW