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Liquid Engineering Thread.

Which Oil manufacturer do you use?

  • Mobil

    Votes: 7 8.8%
  • Castrol

    Votes: 30 37.5%
  • Amsoil

    Votes: 6 7.5%
  • Pennsoil

    Votes: 0 0.0%
  • Valvoline

    Votes: 10 12.5%
  • Shell

    Votes: 4 5.0%
  • BMW

    Votes: 11 13.8%
  • Royal Purple

    Votes: 1 1.3%
  • Quaker State

    Votes: 1 1.3%
  • Other

    Votes: 10 12.5%

  • Total voters
    80
1981 R80G/S, 1982 R100RS, 2000 R1100RT
I like to keep it simple and use the same oil in all three bikes.

Manufacturer: Castrol
4 Stroke MOTORCYCLE oil - (Dino Oil)
Weight: 20W50 SG rated

I can get this stuff for a reasonable price at the local Canadian Tire store and pretty much any auto parts place when I am wandering around the USA. I follow the BMW oil change mileage recommendations and usually not before unless I am leaving on a very long ride and know an oil change is coming up in the next 1000 miles or less.

Also use the same gear oil in all the transmissions and drive shafts as well.
80/90 dino hypoid gear oil GL5 rated. I like simple. Simple is good! :thumb
 
Mobil 1 V-twin 20w50 motorcycle oil.
supposed to be API SJ rated:


The Mobil 1 V-Twin 20W-50 container in my hand reads API SG/SH/CF

The webpage I linked says it's SJ rated, and the bottle I have here says:
"meets or exceeds the requirements of API SJ" in the blue band to the left over the SAE 20W-50 rating.
it also says, like yours- API SG,SH, CF rating on the main lable.
 
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