My mower is 10yrs old with a 4 Stroke Vtwin 20hp+ engine that has had dino SAE 30 oil the majority of it's life. I switched to full synth oil a couple years ago and added Seafoam in the oil and fuel since the pistons look caked with deposits when I removed the plugs. What oil additive would you...
The original 3.8L GDI engine in my daily driver 2013 Genesis Coupe lasted over 100k miles then ceased due to bad bearings despite regular 5k mile OCIs and Blackstone UOAs showing good wear #s on Mobil1 full synth 5w30 and oem filters. It had 1qt of oil burn every 5k miles that developed late and...
