BSA B33 (1960)

[Kevg]

Recently picked up a 1960 B33 and changing the oils - Rather than trawl through the oil thread......can I get a yay or nay please on my suggested oils
Engine Morris SAE50 Classic Motor oil
Gearbox Morris AG90 Classic Gear oil
Primary - any 10w?

I've used Morris in my other bikes no probs so that's why I suggested them

Thank You

KevG

[rustyboots]

Hi
Right or wrong ive just gone for Smith and Allen straight 40 non detergent for my engine oil change.

I nearly went for the Morris stuff but it says on the can Low detergent ?, had been warned against it though?

Confused a little as the Haynes manual says sae 30 winter / sae 50 summer  or 20w/50
and the same oil for gearbox and primary.

Just waiting for the back lash now

[Kevg]

Thanks for the reply and info Mark

I'll take a look at the Smith and Allen oil. The non detergent may be a better bet

Yea,the manual I have also says the same, 50 weight for the summer and to use the same in the box and primary

Just wanted to see what others were using before I purchased the oils

Thanks again

[Roy]

I have for Many years used Morris 20/50 all year round ,in engine  with No problems at all , I have a fried who does massive mileage per year , tour the continent etc also morris 20/50  ,

[Derek996]

I use Smith and Allen non detergent SAE40 oil in my B32. I think the 40 weight oil is a good compromise between 50 for summer and 30 for winter. The bike never gets used in winter and our summers here in Scotland are never that hot anyway 
Importantly, unless the engine has been stripped and completely cleaned internally you should never use a detergent oil as it will loosen the crud which will have accumulated in nooks and crannies allowing it to circulate with the oil, possibly causing damage.

[rustyboots]

This was the scenario I was warned about.

[quote
Importantly, unless the engine has been stripped and completely cleaned internally you should never use a detergent oil as it will loosen the crud which will have accumulated in nooks and crannies allowing it to circulate with the oil, possibly causing damage.
[/quote]

[Kevg]

Many Thanks for the replies everyone,very much appreciated