I think the only reply is:-
I think the only reply is:-
Only if you have no understanding whatsoever of the mechanism involved in valve seat recession! Have you been taking lessons from IMM? You're starting to sound an awful lot like him.
In message , "Dave Plowman (News)" writes
Quiet at the back there please
In message , IMM writes
Your morris minor was designed to be fairly robust
Shows how little you know really, doesn't it John?
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I use to avoid Shell on my Midgets. Very low octane rating. National 5 star was the best.
I remember Esso being OK, and BP, bt ISTR mobil s OK as well for me. It was the shell something or other blend - powermax? - that turned out to be utter crap.
These days anything goes. I notice more difference in diesel than petrol qualities. Worst case was driving a car transporter back from Yorkshire: after a fill up at a 'cheap ' station it would not go over 45 mph without misfiring and producing huge quantities of white smoke. Filling up with regular motorway blend cured it completely...
Er. less than that. Ther recommneded srevice interval on my Triumph Spitfire 3 bearing engined was 30k for big ends and 60k for mains, and, tuned up to the extent I did, that was absolutely correct.
BMC series A and B engines were the same.
The word you are grasping for is "too" with two O's.
The material the head is made of is very relevant. Iron heads without seat inserts won't last on unleaded. Aluminium heads must have seat inserts by definition because a valve can't run on aluminium. Whether those inserts are high enough quality to run unleaded is another matter.
Having machined some of those heads I'm fairly sure the inserts are often only cast iron rather than steel which is why the problem with unleaded occurs.
'63, AFAIR. It was a pretty modern lump for Oldsmobile, what with that new fangled aluminum block and all.
The improved lubricating qualities and resistance to high temperature breakdown of synthetic oils are so widely known that anyone who disbelieves this is fact is probably a loony. And going by some of your other posts......
Yep. I know a man who runs a fleet and swears by Ultimate. So I think they are right.
You can't think
That is right, John doesn't know things.
Late 1950s, Rover acquired the engines in 61.
disbelieves
I agree. They also cool the engine too.
I'm sure my vRS would love to hear that. Would save money on buying the specific VAG product. And the same goes for SWMBO's 2.0PD Touran. Both come with copious warnings regarding which oils are suitable.
Cheers Clive
As I said, what the head is made out of is irrelevant, what maters is what the seats etc. are made out of. Thank you for, in a roundabout fashion, agreeing with me !
It is when you fail to understand that what the head casting is made out of is irrelevant to the problem.
The same is far more true of yourself in this respect.
disbelieves
And marketing speak, you don't NEED synthetic oils, otherwise 70 percent of all the engines used in road vehicles ever build would seize.
I'm not arguing that *high performance* engines don't need synthetic oils, just that the majority of road going cars don't and it's marketing that have told the mass motoring public that they need synthetic oils.
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