[stewlane]

what grade engine oil is used in the 1960 constellation and what is the service interval between oil changes , many thanks

[AzCal Retred]

Multigrade 50W and change about every 1,500 miles, new oil/filter is the normal span. Castrol makes a nice 5W/50, Walmart carries Mobil-1 15W/50 for about $25. Filters are cheap on ebay. "Change early & change often..." Practically any modern oil is way better than anything available in the 1950's when these engines were designed.

Hitchcock's Royal Enfield downloadable manual:

https://accessories.hitchcocksmotorcycles.com/core/media/media.nl?id=238082&c=1062795&h=dd006ad05e192545d272&_xt=.pdf

[DaveDup]

I use either Halford classic 20w/50 or Opie classic 20w/50 in my Super Meteor.
I change oil filter every 1000 miles and every spring regardless.

[stewlane]

how much is the total capacity of oil in 700 cc Connie ?