Quicksilver 25/40 oil

Messages
6
Location
California
I see that the Quicksilver 25/40 oil states it is a unique oil without VI improvers to break down. How would this type oil be formulated to accomplish that? I read this on the bottle label but I could not find any information about it on the web
 
Messages
700
Location
USA
I have a post about this in the boat, lawnmower section. It looks like good oil for my boat, But the dealers and the factory (PCM, Ford) tells me i stillshould use a straight weight 30 or 40. They did not like the Quicksilver brand.
 
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