Well, this is my first oil change since I got my used tractor and I'm pretty confused about the best oil grade I must use in the tractor...
In all my other small engine equipment (snow blower and lawn mower) I got recent Briggs & Stratton engines and both recommend to use 5w30 Synthetic oil for all climates (winter/summer). But I just downloaded the owner manual for the Tecumseh OHV180 engine in my Cub Cadet and they recommend to use 5w30 for climate under 40'F and SAE30 only for climate over 40'F . They also tell using multi-viscosity (like the 5w30) over 40'F can damage engine and cause oil consumption.
I wanted to use fully synthetic automotive oil, what grade should I use? A friend of mine (who is an automotive mechanics) told me to use automotive 10w40 (actually not recommended in the owner manual) or 15w40 synthetic oil in the tractor since I use it only on summer (always over 80'F). Maybe the standard 10w30 synthetic can do the tric? Is that correct?
That's sad because I'll need to keep different oil grade in the garage, one for the tractor and 5w30 synthetic for all my other small engine equipment and also both of my 2 cars that use 5w30 synthetic!!
Thank you for your advice!!
Edited by vlopddap, June 26, 2014 - 10:25 AM.