This I had analysed to get a feeling if I would discard oil changes with the car, not for judging performance of an individual oil obviously. (Ro 80 rotaries in the end were said to not require them any longer it seems and although the Renesis' continuous exchange rate should be about half as high, with the more modern oils that's still what I'm trying.)
Main use overland, daily driver. Bought the car filled with fresh Mazda Original Supra 5W-30 and went on litre by litre with no filter change and several different products over the 31000 kilometres distance till "Oelcheck". Those were:
1l 10W-40 ATU
5l Kroon Polytech 5W-30 (PAO-OSP)
1l 20W/50 Eurolub GTS
5l Motul 5W-50 (PAO-POE)
3l Kroon Polytech 5W-30
1l 20W/50 Eurolub GTS
Main use overland, daily driver. Bought the car filled with fresh Mazda Original Supra 5W-30 and went on litre by litre with no filter change and several different products over the 31000 kilometres distance till "Oelcheck". Those were:
1l 10W-40 ATU
5l Kroon Polytech 5W-30 (PAO-OSP)
1l 20W/50 Eurolub GTS
5l Motul 5W-50 (PAO-POE)
3l Kroon Polytech 5W-30
1l 20W/50 Eurolub GTS
Last edited: