My P38 Thor 4L has a full recon engine with about 50k on the clock.
I've done about 20k with 20/50 engine oil / filter changed every 6500 ish - no issues at all.
Rave mentions 10/40 Semi Synth.
Looking at changing the oil soon and just musing whether or not to go to 10/40.
I've just laid out circa £400 for tyres and will cry buckets if the 10/40 duffs things up.
What say ye ?