Almost three years ago I started using synthetic 20w50 in my Tecumseh 3.5 HP motors (a mower and a pressure washer). I know standard wisdom says nothing but straight 30 in side-valves, and the manual
If it's in the Tecumseh manual, isn't that the final word on the topic? I don't work in the mechanical field and my mechanical knowledge is only average for this list, but I do work in an engineering
Do you think they also knew what improvements would be made to commonly available lubricants in the next 30 or 40 years ? For example, 30 years ago viscosity improvers had a definite tendency toward
By no means. The people who write the manual (who are very rarely the designers) also have to take in to account the user of the product. The average user of a lawn mower isn't too mechanically incl
Absolutely not. No more so then warnings about no customer serviceable parts inside. Yet many of us take apart and repair our microwave ovens and such quite successfully. In spite of warnings from t
Let's not confuse saying a product is "perfect" versus saying a product is "known". They may KNOW that the weak spot of the design is the connecting rod, or the flywheel end of the crank, etc. etc. T
Shop Talkers, On a corollary, Harley Davidson prior to this year specifically did not recommend synthetic oil for their air-cooled V-twins. They recommended 20w50 dino oil with the diesel specificati
On Wed, 09 Jul 2003 14:49:12 -0700, dirtbeard <dirtbeard@pacbell.net> Volkswagen UK had a similar thing with oil for their direct injection diesels. You couldn't wander in with your car for service a