flatheads normally 30w overheads 10w30 high detergent
Briggs engine 30w detergent, kohler engine 10w-30
Some website says 30w non-detergent?
30 weight non-detergent oil is what was used in the 20s. But you can and should use SAE 30 High Detergent oil today as it will provide many benefits. If you have been using non-detergent oil then there is more than likely a sludge buildup in the engine at this time. You should not switch to High Detergent oil unless the engine has been rebuilt and totally cleaned. The reason is that the HD oil will loosen all this sludge and contaminate your crankcase. So, if you know the engine is clean then use SAE 30W otherwise use 30W non-detergent oil.
Commonly 30W of SG or higher rating
30w and if you want i higher quality oil, use synthetic
Generally 30W of SF or higher rating
Generally, 30W of SG or higher rating.
30 W
30w, 10-30w or 10-40w
The GCF of 30w and 75w is 15w.
HD makes a weight of oil they call "Sport-Trans" that is made for use in the Sportster primary. Or, you can use any 30W non-detergent oil.