Please recommend engine oil for Saga BLM manual with 55k km old. I believe it was always using default budget engine oil any workshop has so far. I want to buy engine oil and filter online during sales and keep for its next service. Can change to any different types of engine oil anytime or have to completely empty old oil?

Recently I see leaking oil on the engine and checked online seems due to old gasket. I plan to service and change gasket in near future. I hope to get good engine oil that can protect this engine. Wonder if any specific engine oil is better to prevent leaking after service.

Thanks in advance.

I have bought Mizu full synthetic engine oil and also Mizu engine oil treatment, plan for Saga BLM 55k km old next service.

I guess this Saga BLM has been serviced with budget workshop oil once a year over the years. Seems the engine valve gasket is leaking because of age, it is noisier and annoying when cold start.

I asked a foreman, he said don't use that oil treatment, he suggested using engine flush instead. I googled, found pro and con of doing either oil treatment or engine flush.

How to minimise the risks if I do both engine flush and oil treatment?

I thought to monitor (dipstick and noise) and change engine oil again in shorter time frame, maybe after 3 months (estimated 3000 km), maybe with better premium brand oil the next time, hopefully to improve the engine performance and reduce noise. Eventually can use back non premium brand oil.

This post has been edited by M2020: May 3 2025, 12:33 PM