T
Tom
I had the mechanic at my marina change the oil on my Yanmar engine and instead of putting in what I requested, 15W40, he put in straight 40. He also put straight 40 when he changed the transmission oil even through I requested SAE 30 oil. He gave me the excuse that it doesn't manner. Besides being irritated with paying someone to do something you didn't want them to do what is other people's experience with Marina's mechanics. Does anyone know if it really doesn't make a difference? I normally just put in what the owner's manual tells me. Silly me.Tom