Oil change intervals

Some questions sprung to mind immediately on the experiments:

The official reports on exxonmbils website. Switching oils would seen odd, you'd normally just run 2 engines.

lol..sometimes i just add oil additives.instead of changing the oil. if i add a oil additive at 3300 miles i'm good for another 2000miles.lol

stuffed i use webtv cause i bought it 7 yrs ago n it still works... n buy dodge....its the best.

Dodge.... riiiiight...

sorry.. dont think so....n i was a dodge man long before the viper was made.

yes. the fastest car on the planet. theViper.

Hmmmm, what planet though ?

Even in a straight line it's vastly outclassed by many other cars nowadays, at least here on earth...

You heard it wrong.

Oil can and is analysed to see how it has stood up to use. It's a man made substance - not some miracle plant extract. Decent synthetic oils can last for over 30,000 miles with no deterioration under the right circumstances.

That would be the planet you come from? It never has been the 'fastest car on the planet' Earth.

Thanks. So not particularly frequent oil changes then, the trick for achieving high mileage is just to run your car continuously 24 hours a day.

Yep, see generators or cars that live on motorways for details.

When last did you wear out an engine?

But who really wants an engine to last a million miles - most cars will be worn out far before that.

My RX-7 after 120k miles and frequent oil changes.

Exactly.

There are reports that engine wear is greater in the first couple of thousand miles following an oil change than it is for several thousand after that.

"Testing with partially stressed oil, which contained some wear debris, produced less wear than testing with clean oil. This finding was unexpected and initially confusing (further inquiry suggested that the result was not so surprising, as many oil chemistries require time and temperature to enhance their effectiveness)."

There is a problem with this reasoning. The reality is that we do not know how long one specific engine will last; we may have a rough idea of the ball park but pinpointing it down in terms of a numerical value in the future is not possible, and talking of changing this value by a mere adjustment of the OCI is hot wash.

It's like not being able to tell from the appearance whether a specific piece of pork chop is cooked thoroughly or not, and we definitely do not want any raw pork meat for fear of possible parasites, we continue to heat the chop for a period of time arbitrarily chosen knowing that that will be overcooked if not burnt. We overtreat when we don't know.

This is the same in OCI, we have to overdo it when we have no means of knowing when the engine will giving up the ghost. If a 3000-mile change is called for, so be it.

Dave Plowman (News) ( snipped-for-privacy@davenoise.co.uk) gurgled happily, sounding much like they were saying :

It may have been the fastest (production) car on the planet USofA for some brief point, I s'pose - and for webTV users, the planet USofA == Earth.

Bless 'im. He probably thinks that "uk" in the group name is "Uhhh, Kentucky"...

However the cost of the consequences is relevant. Engines are cheap even if the 3000 mile intervals reduced the failure significantly, as they reduce the failure rate almost insignificantly they're expensive. Liver flukes are a right bugger compared with overdone pork chop.

On Tue, 06 Mar 2007 22:46:03 -0000, Adrian wrote= :

To be fair they're damn quick in a straight line. You'll be wanting a 91=

turbo or a vauxhaull carlton to beat one..