A QUESTION OF CLEANESS

[Dave Mann]

x is an unknown quantity while spurt is a drip under pressure.

[Tony Press]

As Donald Trump would say 

[Tony Press]

"Apologies if that sounded a bit blunt. Experts themselves often own up to knowing a great deal about very little; to understand their pronouncements properly it's important to understand their perspective.

As for virus control in the UK, as far as I can see they have left it to the supermarkets?"

For me it seemed a bit 'pompous'  but then I am not an expert. 

This suggests you wouldn't ask a number of tyre technologists about virus control.

Or discuss a hip operation with an experienced mechanic.

[Chris KC]

Oh dear, I should hate to be thought pompous Tony - unreserved apologies to all concerned for my poor choice of phrasing.

[John Mason]

Hi Chris, Nothing wrong with being pompous especially if your are right and correct. We all have our own preference on what to use or how to do things. They are not the best or the worst on how to to it or what to use just different choices from others.

John Mason

[Ian McGowan]

It seems to me that an element of confusion has crept in here between detergent and non detergent oils and multi-grade and straight oils. Multi-grade oils need not be high detergent, just as straight oils need not be non detergent. I believe that for normal road use in our cars multi-grade oil (in my case 20/50) is always a good idea but, because I don't have a cartridge filter I use a low detergent multi-grade specifically formulated this application. In my case I usually use Morris's Golden film 20/50 Classic motor oil. This is what the manufacturer says about it:
 MORRIS'S GOLDEN FILM 20W-50
Classic Motor Oil
Description:
Golden Film SAE 20W-50 Classic Motor Oil is specialist high quality, low detergent/dispersant multi-grade lubricant. This oil is suitable for use in naturally aspirated four stroke petrol and diesel engines.
Applications:
Golden Film SAE 20W-50 Classic Motor Oil is recommended for use in veteran, classic and vintage cars, motorcycles, commercial vehicles and tractors, where engine design and tolerances prohibit the use of modern high additive level oils. Golden Film SAE 20W-50 Classic Motor Oil is a low dispersant oil and allows any solid contaminants to drop harmlessly into the sump. This is an important feature where early methods of oil filtration, such as mesh gauzes or strainers are fitted.
The multi-grade properties of Golden Film SAE 20W-50 provide improved cold start circulation whilst maintaining good working oil pressure.

[Howard Wright]

Hi Chris

Doesn’t apply to you but on our desk calendar this week.....

Pompous! Of course I’m pompous.  If I wasn’t pompous I’d be perfect and no one would like me....

Cheers

Howard

[Bob Culver]

Re all the above, graphs in the book Whcih Oil show the bulk viscosity of 20w50 to be in excess of 30 from temps quite a bit lower than 0 deg C. So in most use 20W50 is actually thicker for normal starts.
Diesel engine oil turns very black very quickly but not a problem.
The most dangerous deposits are the heaviy compacted in galleries and esp inside the crank. Winkle out with wire.To the 1950s my Seven with a lot of short running developed heavy grey sludge. With cheap modest or no detergent oils of early 1960s and much later no trace of sludge with extensive hot running.

[Rpm]

Ian McGowan, Golden film , I read with Interest, Thank you for your time.
RPM.

[jansens]

My dad always referred to experts as 'retired drips under pressure'. He worked for a university so he was surrounded by them.

Simon