jgrow Posted January 6, 2014 Report Share Posted January 6, 2014 Just getting into dirt drags. What weight and oil type would you recommend for a 421 cub with overide and lock up? Thanks. Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted January 6, 2014 Report Share Posted January 6, 2014 <p>I like Rotella 15/40 diesel oil. Or Klotz flexdrive.</p> Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted January 6, 2014 Report Share Posted January 6, 2014 mobil 1 5w30. the regular synthetic, no extended life or high mileage stuff. Quote Link to comment Share on other sites More sharing options...
04_blu_shee Posted January 6, 2014 Report Share Posted January 6, 2014 ATF Type F everyone has their brand and type Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted January 7, 2014 Report Share Posted January 7, 2014 Any performance synthetic ATF is ok. You will find one you like for every 15 you don't like though. So once you get one that works keep using it as different oils add another variable in clutch tuning. Quote Link to comment Share on other sites More sharing options...
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