GTti Oil Recommendations by Matt Slade

There are many things to consider, it is important to understand the condition of your engine and the mileage it has covered. Oil should be changed every 3,000 miles in a CB80 if you want a good running long living engine.

DO NOT USE A SYNTHETIC OIL WITH A 0W VISCOSITY! THIS IS BAD FOR YOUR ENGINE!

If your engine is old and the stem seals are worn etc, then I would use a semi synthetic oil. If your engine is in good condition then I would use a good quality synthetic oil like Mobil 1 Motorsport (not Mobil 1, there is a
difference).

Ideally you want a synthetic oil with a rating of something close to 10W 50

According to the Manual use 2.7 Litres when oil is only changed, When oil and oil filter are changed use 3.1 Litres