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| Joined: | 03-11-2005 |
| Location: | San Anselmo, California USA |
| Posts: | 983 |
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Interesting that the Castrol GTX was 30 wt. in the 20-50 bottle!
Looks like the GTX High Mile 20-50 and the Valvoline VR1 are available locally and have the zddp required.
For synthetic, the Royal Purple could reduce the leakage problems with Mobil 1.