Hitchcocks Forum

Hi,
Just got a 2005 Electra lean burn engine what is the correct oil , on a lean burn engine used to use Halfords classic oil 15 w 40 on my old classic .

15/40 should be OK; 20/50 in hot climates. I would try to obtain a workshop manual or handbook for the model. Most Royal Enfield oil seldom reaches 60C even in the semi-tropics. Ideal temperature should be around 80C.

Recommended grade of oil for UK is 10W40 - a good 'named' semi-synthetic should be ideal in this engine.

15w/40 is the grade recommended in the book for both the engine and primary case. You can use ATF in the primary, although I found no benefit, rather the disadvantage of clutch drag and having to buy another bottle of expensive oil.

The 'book' isn't exclusive to the UK - our hosts recommend (and use) 10W40 in lean burn engines for the UK

20/50 mineral oil won't hurt them, the tuned one with 27000 miles on it has that inside its' engine, gearbox and primary case.

Hi,

Got 10w40 silkollene fully synthetic ester oil

Is that ok ?

I wouldn't fancy using that and it won't mix with any mineral oil which might be lurking in the engine.