Good luck starting a BS 5600w gen set at subzero F temps with 5-30w in it. Only 0-30w full synth. will allow it to spin over fast enough to start.
With 5-30w the recoil lifts the genset off the ground and not enough ''spin'' to fire it up.
The BS chart is flawed for cold weather oil weights. They don't sell a 0w bottom number oil also. I run at least 10-40w in summer engines.
Biggest issue is not so much oil weight but regular changing of it and clean air filters on mowers.
With 5-30w the recoil lifts the genset off the ground and not enough ''spin'' to fire it up.
The BS chart is flawed for cold weather oil weights. They don't sell a 0w bottom number oil also. I run at least 10-40w in summer engines.
Biggest issue is not so much oil weight but regular changing of it and clean air filters on mowers.