I usually buy Castrol 20w50 for my M10s & M30. Happened upon an estate sale near my house and found 20 QTs of GP1 20w50 high zinc racing oil. Thoughts on using it in a stock m30? At $2.00ea I could not pass it up.
It was the estate of a Porsche owner. Also found Wurth brake cleaner(2), LiquiMolly injection cleaner(6j and Motul Dot 4 brake fluid (2).
No Porsches but a nice 86 Mercedes 300e that tempted me but I did not bid on it.
![IMG_3856.jpeg IMG_3856.jpeg](https://e9coupe.com/forum/data/attachments/183/183683-1b6a7c337349bda510d811a02ef0ea54.jpg)
![IMG_0290.jpeg IMG_0290.jpeg](https://e9coupe.com/forum/data/attachments/183/183684-b1b6cf8aa015a97e4709302ede906a15.jpg)
It was the estate of a Porsche owner. Also found Wurth brake cleaner(2), LiquiMolly injection cleaner(6j and Motul Dot 4 brake fluid (2).
No Porsches but a nice 86 Mercedes 300e that tempted me but I did not bid on it.
![drivenracingoil.com](/forum/proxy.php?image=https%3A%2F%2Fdrivenracingoil.com%2Fimages%2FI30497797.jpg&hash=c982cf44a52ea0d6eb88ef291bb4d524&return_error=1)
GP-1 20W-50 Synthetic Blend High Performance Oil
GP-1 20W-50 Synthetic Blend High Performance Oil
drivenracingoil.com
![IMG_3856.jpeg IMG_3856.jpeg](https://e9coupe.com/forum/data/attachments/183/183683-1b6a7c337349bda510d811a02ef0ea54.jpg)
![IMG_0290.jpeg IMG_0290.jpeg](https://e9coupe.com/forum/data/attachments/183/183684-b1b6cf8aa015a97e4709302ede906a15.jpg)