Mobil 1 V-twin 20w50 oil

[JGood]

It's also $4.50+ /qt, which is 2.5x the cost. I found 37 gallons of this stuff (!) for $275...

Normally I run non-synthetic, but this is even cheaper then the cheapest non-syn's... I can't turn it down, unless someone can tell me it's specifically not good for our motors. But all I can find so far is that a lot of air-cooled Porsche and motorcycle guys use this oil, and it's around $8/qt. It's also apparently one of the very few true group IV oils left.

[M-technik-3]

Valvolene VR1 is a high ZDDP oil and reasonable in price.

[JGood]

Anyone use this? I came across a large quantity for $1.85/qt, and am wondering if it is OK to use in my m20 track car. I know it's motorcycle oil, but from what I understand it's high in ZDDP.