R50/53 what brand oil do you use?
I've always used Mobil1 5W-30 fully synthetic (gold cap/extended life).
Ditto for both of my JCW's.
Ever since the break-in oil left the JCW crate install (I drained the factory/dealer oil, added the RP break-in, then broke it in on a dyno, then Amsoil + Blackstone tests ever since)
Ever since the break-in oil left the JCW crate install (I drained the factory/dealer oil, added the RP break-in, then broke it in on a dyno, then Amsoil + Blackstone tests ever since)
I just put some Mobil1 0w-40 European formula in my 03 with 70k miles. I drained out some Royal purple 5w-30. I was going to put amsoil in, but I change my oil every 7,500 miles (I rarely get on the highway) and for the Amsoil it would have been $60 compared to the $26 for mobil 1
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