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Deisel Motor oil?
Posted: Tue Mar 13, 2012 4:56 pm
by joelh
Went to Walmart looking for oil for my 96 R1100R Haynes is showing 20W-40 or 20W50 for my temps and the only oil I could find is Rotella for deisel. Will that work or should I opt for a higher quality oil? Can't beat the price. $12 for a 5 qt. jug
Re: Deisel Motor oil?
Posted: Wed Mar 14, 2012 8:43 pm
by libertynh
Diesel engine oil is rated with an API symbol beginning with C as in CH-4. Gasoline engine oil is rated with a symbol beginning with S such as SJ.
Re: Deisel Motor oil?
Posted: Thu Apr 19, 2012 4:06 pm
by The Meromorph
Rotella is rated with both gasoline and diesel ratings and is fully suitable for your bike.
There are two Rotellaa the T5 (15W-40 Mineral oil), and the T6 (5W-40 full Synthetic).
Both are one of the highest quality oils in their respective class, and have been used in BMW oilheads, and hexheads with no problems.
Re: Deisel Motor oil?
Posted: Thu Apr 19, 2012 8:19 pm
by libertynh
Good to know they will work well in the oilhead. Think the local Walmart had the plain Rotella T straight mineral oil and the previous owner of my wife's higher mileage oilhead recommended against synthetics for that bike.
Re: Deisel Motor oil?
Posted: Sun Apr 29, 2012 3:08 pm
by Commainz
20W-50 and mineralic stuff - that what you cow wants

Re: Deisel Motor oil?
Posted: Sat Oct 13, 2012 12:26 pm
by Photo
I used to use the 20w-50 Rotella in my (former) '03 R1150R, and it ran fine during high-temperature days. My current '01 R1100R is going to get some fresh 15w-40 Rotella when it needs an oil change. Good oil, IMO...
Re: Deisel Motor oil?
Posted: Wed Oct 24, 2012 11:07 am
by GerryO
So is the mineral favored over the synthetic for a reason? Need to change my oil (just bought the bike 42K) and need some advice on this. Also is there a recommended aftermarket oil filter?
thanks
Re: Deisel Motor oil?
Posted: Thu Oct 25, 2012 12:15 pm
by Ton1959
Motorex do a special oil for the BMW boxer. This oil is superb. My oil consuption wasn't a lot but improved with the Motorex. Mine is the 15W50. But the Castrol synthetic 10W50 is also very good. Synthetic beats the mineral oil in my view.
Ton