BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) - View Single Post - Royal Purple Gear Oil 75-140 (with Friction Modifier)

OneM · 05-02-2013, 01:34 AM

My initial diff oil change was done with Castrol SAF-XJ (without Friction Modifier), and now the car makes some grinding noises during low speed turns. So I'm considering getting an oil with "Friction Modifier'. So far I can't seem to locate any shops with Castrol SAF-XJ + FM so I'm thinking of getting the Royal Purple + FM.

Anyone tried this on their 1M? Any good ..grinding noise?

05-02-2013, 01:34 AM	#1
OneM Private First Class 24 Rep 117 Posts Drives: 1M Join Date: Apr 2012 Location: Australia iTrader: (0)	Royal Purple Gear Oil 75-140 (with Friction Modifier) My initial diff oil change was done with Castrol SAF-XJ (without Friction Modifier), and now the car makes some grinding noises during low speed turns. So I'm considering getting an oil with "Friction Modifier'. So far I can't seem to locate any shops with Castrol SAF-XJ + FM so I'm thinking of getting the Royal Purple + FM. Anyone tried this on their 1M? Any good ..grinding noise?
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