Alternative to Redline Heavy Shockproof for Rear Diff

[Ice Racer]

Ok, so I can't get it in Canada and it's too expensive to ship 1qt. ($20 shipping plus brokerage fees). I wish I had a bigger order to place with RRE but alas...

So what's a good alternative?

 

[mrallen]

have you tried royal purple? i have all rp fluids in my car

 

[Boost92awd]

have you tried royal purple? i have all rp fluids in my car

+2 Thats all I run in my car too. But I think its more expensive that redline fluids. But its dyno proven to make more horsepower.