Is SynLube Compatible With Other Oils?
SynLube Lube-4-Life is compatible with all conventional and part synthetic oils and you may switch to SynLube Lube-4-Life at any time. It is not necessary to flush your engine. If you used an oil additive with your conventional oil you can use SynLube Lube-4-Life , however we do not recommend that you continue to use oil additives because SynLube Lube-4-Life is specially formulated to provide your engine with superior protection.