03-03-2019, 07:27 PM
I am using Semi-synthetic 10W/40 in my RP Saloon. It is a bit thinner than a 20W/50 and i keep thinking of a thicker oil trying to get through the big end bearing jets! As Reckless Rat has said, provided the engine is clean to begin with then perhaps OK. I have had no difficulties so far, but then I have only done about 1000 miles in the car since October. Also the engine oil has been changed twice in that period, once when I got the car and again about 200 miles ago when I had the engine apart to do the rear main bearing. On both occasions, the sump and gauze was cleaned. The first time, the sump had some sludge in it and the gauze had some bits in it, but the second time, there was no 'crud' at all either in the sump of the gauze.
I note that my handbook recommends changing the oil periodically, but , frustratingly, does not specify what 'periodically' means. Something at the back of my mind says that the oil should be changed every 1000 to 1500 miles. I shall change mine at 1000 mile intervals.
I note that my handbook recommends changing the oil periodically, but , frustratingly, does not specify what 'periodically' means. Something at the back of my mind says that the oil should be changed every 1000 to 1500 miles. I shall change mine at 1000 mile intervals.