12-01-2020, 04:07 PM
I have been using straight 30 oil in my car. I always think that thinner oils are preferable - they reach parts other oils don't.
Currently I'm using up the various odds and ends of 20-50 that I have accumulated. The oil pressure is noticeably higher and I doubt whether that is any advantage. When cold I suspect the flow through the jets is diminished, just when its needed most.
My local motor factors now sell a very well priced semi-synthetic 5W 30 which I shall move on to at the next change. It'll be interesting to see how it performs. I would expect much better flow when the engine is cold. When hot it ought to be similar to straight 30.
Recently I dismantled the engine to fix an oil leak from the rear main. There was negligible sludge from about 10,000 miles running.
Currently I'm using up the various odds and ends of 20-50 that I have accumulated. The oil pressure is noticeably higher and I doubt whether that is any advantage. When cold I suspect the flow through the jets is diminished, just when its needed most.
My local motor factors now sell a very well priced semi-synthetic 5W 30 which I shall move on to at the next change. It'll be interesting to see how it performs. I would expect much better flow when the engine is cold. When hot it ought to be similar to straight 30.
Recently I dismantled the engine to fix an oil leak from the rear main. There was negligible sludge from about 10,000 miles running.
Jim