I think you're rather missimg the point here, Dave. If you use an oil with less than the required amount of ZDDP then the cam will wear even if you tow a tanker of the stuff and work on a total loss system! Equally, the progressive contamination of the oil with particulates will take out every bearing in the engine if you don't change it often enough.
So I'm afraid you're stuck with the best filter you can lay your hands on (the K&N one), plus changing at 3,000 mile intervals, plus using a quality high ZDDP brand.
well you can do both, the comma sonic and europa both have more than enough zinc and phos and its only about £11 or £12 for 5 litres the api spec is SF from memory so thats fine too so you can have a good spec oil and change it often too, your engine will love you!
BTW I dont work for comma lol, I am just passing on a good tip I found out!
Have just been told by my local factor that Duckhams oils has been bought out by Castrol, and the name no longer exists in the lubricant world, I know I have been away for a while, but when did this happen ? :shock:
I have used only 2 engine oils throughout the life of my 3500S , from new and all through the 1970`s and early 1980`s I used Castrol GTX as recommended in the drivers handbook. As the car approached 50,000 miles in the late 1980`s (the car was my daily driver doing circa 350 miles a week) I switched to Duckhams 20/50, which gave very good results with no problems whatsoever, until she was retired from the daily commute and became a more treasured (and polished) member of the family in the 1990`s.
I have read through a lot of the posts on the subject but I am no chemist and the zinc content and other additives that may or may not be included in various oils has confused me.
I still have a half full 25 ltr drum of Duckhams which I will continue to use until finished, but what do members recommend thereafter ?
Halfords 20/50, Morris 20/50 (which I use in the gearbox) ?
Thank you one and all for your very valid advice and observations.
I was assured at the time of purchase (at a too good to miss price !) in 2009 that the 25 ltr Duckhams 20/50
would maintain all of its qualities for at least 5 years - as long as it was stored in temperate conditions and the
screw cap was replaced immediately after every use. Unlike any petrol which as we all know does deteriorate
I think,on balance, I will switch to Morris 20/50 when the Duckhams is exhausted, thank you Chris for suggesting their
10/50 for winter use, sound advice, as I was unaware that they produced a lighter engine oil for colder climates.
I have had very positive reports from the farming community around here that Morris products are popular.
Millers oils seem to be hard to find in this particular neck of the woods for some reason (except their
petrol treatment products)
Thank you for the suggestion of Opie Oils Ltd, I did not know of them before.
The purchase price of Classic oils seems to be more or less equal among producers,Morris, Miller etc however there is an interestingly
cut-throat outlook between them on the delivery side of purchasing:
Hi all , I know this has been done to death , but reading what Chris has written , and reading in practical classics the guy with the series 1 is considering using a 10w40 semi synthetic in his v8 . What are the options for a slightly thinner oil for winter use ? I'm thinking of reducing the strain of the high volume oil pump on the skew drive gears with short winter runs ?
The theory with the numbers that describe the oil is that the first number is what the oil behaves like when cold, the second number what it behaves like when hot.
Since hot in winter is just the same as hot in summer (unless there is something else wrong!), don't mess with the 50 bit!!
But I can see the logic of going for a lower initial number in winter. Hence the idea of trying a 15/50 in Lucky for this winter. (hang on, we haven't had summer yet... oh.... we're not having one?..)
As for going semi synthetic... well you can all tell me how you got on in ten years time.... And I bet he hasn't checked whether there is any ZDDP in there... but then, perhaps they want an excuse to fo a feature on camshaft changes on the V8 in a couple of issues time....
They should all have the right zddp content. Just wondering which is going to be best in performance/viscosity terms? PAE will still be on the original oil pump gear and spring to the best of my knowledge! I dont know what pressure it develops as being an s1 we have no gauge!
Well, 20W60 is out on the basis of the higher viscosity at running temperatures. Personally I would also avoid the semi synthetic 20/50 on the grounds that it is semi sythetic. Leaving your third option.
Not interested in the MOrris's 15/50? Or will there be another oil change by the winter?
Don't forget to use a decent filter such as the K&N HP-2003 to gather up all the small particles that other filters don't touch....