This trip was just out of the blue.Even though this oil was 10W40 I tried it as it was full synth. But I still would advise lowering to maximum of 15wXX for this engine whose recommended grade is 20w50 in the 'service' manual.(But this engine was broken in on 20w40 oil 'only' so another factor there)
As for the engine sounding harsh after 90kph we still have to factor in that the engine is not at all used to such high speeds & also we are going above the highway cruising speed for this originally detuned engine.
Also I was wary of using ester base oils as they tend to give head gasket leaks.
P.S:
just had to try this oil after seeing it come in the top 3 overall with 300v & amsoil in the tests in the popular article [Oils well...] in this thread.



The mechanic was saying that it is just a mental block, the yellow colored (not the red one) is pretty good & as thick/viscous as branded oils, but just packed in barrels instead of retail bottles..

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