Oh well.. fair enough.
At my work if we put the wrong oil (IE@ put the oil for the Ford Transits) in the wrong car (IE@ the BMW 330) we have been told it will void the guarantee from BMW... and likewise from Ford etc, or Volvo etc, depending on which car you do it to.. Oh yeah, we got a few Sprinters as well
So unfortunately it means we have loads of different oils.
Mind you though as the Fronty is well and truly out of guarantee it's all ok I guess.
As for me, I wouldn't be putting diesel specific oil (like for tractors) in a petrol engine, or petrol oil in a diesel engine (probably worse with petrol oil in a diesel to be honest)..
Si