I've read through several posts recently and did not see much mention of using Delvac 1 in low HP mowers. I recently bought a 3.5HP Tecumseh push mower and am about to change out the 'break in' oil. I will likely start using synthetic, but the manual says that using Xw40 oils may cause excess consumption. The manual says to use an SL/SJ rated oil (SAE 30 for the temps here) & the bottle of Delvac I have now is rated SL. I already use Delvac in my vehicles, so do you guys think I will have any problems using it in the mower?? The temps here during the summer are between 20 & 30 deg C. (70 & 90 deg F or so).