Joined: Aug 2017 Posts: 120 Threads: 6
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Location: Suffolk
Suffolk, UK
1925 Chummy
1934 Box
Joined: Jan 2019 Posts: 1,567 Threads: 20
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Location: Bala North Wales
Car type: 1933 RP Standard Saloon
I have been using the Mannol 10/40 oil bought from Ebay since I have had my Seven. Apart from overhauling the engine when I first had the car, I have not so far had any problems. Mind you, I change the oil every 2500 miles.
Joined: Dec 2017 Posts: 1,160 Threads: 68
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Location: Nottinghamshire. Robin Hood County
Car type: Austin Ruby Mk1 1935
Mike you are correct about introducing multigrade oil into an engine that has not had all the oil ways and passages cleaned. Multigrade will not harm the engine in itself but will loosen and remove any sludge and muck left in the oil ways more than likely causing blockages and oil starvation. I should have mentioned it in my first input.
John Mason
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.
Joined: Aug 2017 Posts: 120 Threads: 6
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Location: Suffolk
It's not multigrade oil, per se, that will clean out the sludge but the detergent additives. There are plenty of low or no detergent multigrades available.
Suffolk, UK
1925 Chummy
1934 Box
Joined: Aug 2017 Posts: 3,393 Threads: 106
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Location: Darkest Bedfordshire
I wouldn't put detergent multigrade into an engine I hadn't stripped and cleaned. But come to that, nor would I run an engine I hadn't stripped and cleaned...
FWIW, on the topic of bulk buying, most manufacturers advise engine oil should be used within about 2 years of purchase. That said, I'm still using up a case of Duckhams which has been unsuitably stored in the roof of my garage for at least a decade and I haven't blown anything up yet.
I've recently "switched" to Morris Golden Film 20W/50 which has one major selling point - their 5 litre containers are just the right width to tuck down in the spare wheel slot of the Ulster. Now that I have two containers, I shall probably re-fill them with whatever is cheaply available.
Joined: Aug 2017 Posts: 327 Threads: 1
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Location: Bristol
If you want an off the shelf oil I can recommend Halford's own brand semi synthetic 15/40 5ltr £24 .99 we use it for sprints/hillclimbs. Terry.