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I do not have any knowledge of how much in house R&D valvoline does on additive packages. However one of my coworkers wives is a chemist. About 10 to 15 years ago she was working for Ashland in the lubricants division. We were talking at work one day and he was saying how his wife had been at...

I ran the mower today for about 30 minutes. Split some wood up for this winter and hauled it in the wagon. It didnt smoke at all on startup and did not smoke at all on throttle up. First time ever no smoke at all. I am amazed that it seems to have freed the rngs up. Oil is still at the full...

I took a picture of the sludge in the drain pan from the first change after i got it. The pics do not do it justice. It was like that for the next several changes.I honestly think it never had an oil change...

I have a friend that fixes up mowers and resells them. He came across a really nice looking cosmetically simplicity boroadmoore 50 with an 18 hp briggs vangard. My wife and I liked it and he gave it to me. Took it home and while he had changed the oil when he got it it was very dark and looked...