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hello,

I have a dragrace engine with 700-750 (520ci) horsepower. I'am running 10 low's with a mustang '67

The engine has a bit of loose clearance on the main and the rods.
The oil i'am running now is R40 Castrol. I want to switch oil because the oil pressure is a little bit low. I want to use Castrol 10w-60 full syntec (I like to stick with Castrol).

Is that a good idea??

Already Thanks

Freek (Holland)
 

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I know you want to stick with Castrol, but try running some Valvoline 20w40 Racing Oil. It is what we use on our Pro Stock stuff on the dyno and I used to use it when running nitrous. It carries quite a pit of pressure but thins down decently but not too much when it gets warm.
 
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