Member Since: 20 Apr 2006
Location: Adelaide Hills
Posts: 183
I'd be reluctant to extend these results for a petrol engine to a diesel. I have had a bit of experience with oil analysis of both mineral and synthetic lubricants in large (500HP+) truck diesels and while those engines work harder than most of our Discos, the oils showed a steady accumulation of abrasives ( carbon and silicon) and an increase in acidity after relatively short periods, as well as fuel dilution. And this was with engines which were used on long-distance operations and thus thoroughly warmed up.
I certainly would not risk extended oil changes with the highly-tuned Td6, especially when used for short runs which do not allow oil temp. to rise to normal levels.
And on a slightly different note, a discussion with a Mobil lube specialist the other day revealed that long-term (12 months or more) storage of synthetic oils may not be a good thing - apparently some components of the oil will separate if it is left undisturbed and a good shake-up is not sufficient to re-blend it. So don't stock up with too much when you see it on sale!Ex Defender 110 200Tdi owner.
I thought the general idea was that if the engine uses no oil (as most TDV6's don't after the initial period) then the oil should be changed more frequently.Zermatt silver 06 reg.
Gone but not forgotten !!!
11th Jan 2007 12:53 pm
noizeman
Member Since: 14 Oct 2006
Location: Wirral
Posts: 133
I think the long lasting qualities of Mobil 1 are well-proven as Porsche are quoting 20k service intervals for the new 911, Boxster and Cayman range. I agree with the concern about diesel engines though.
12th Jan 2007 4:25 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Peugeot Citroen quote 20,000 / 2 Year for Petrol engines BUT only 10,000 / 1 Year for DieselsSteve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
12th Jan 2007 5:35 pm
COMMANDO
Member Since: 09 Oct 2006
Location: NORTH WEST
Posts: 67
mobil 1
I have a leaflet that shows a Mobil 1 test a few years ago.They took a brand new 3 series BMW, put in Mobil 1 and ran the car for 1,000,000 miles on a rolling road.Then removed the engine,stripped it down and measured all the components, which were all still inside the manufacturers tolerances.
ran the car for 1,000,000 miles on a rolling road.
This was a big sales ploy for Mobil1 (and BMW) some years ago and was proved to be a flawed concept.
The vast bulk of engine wear is caused at start-up when cold - especially under v.cold ambient temperatures, and under heavy load eg. towing or harsh acceleration.
A rolling road for 1 million miles would probably have provided the same resuilts even if they were using Spry Crisp & Dry
In truth, I have a lot of time for Mobil1 but not becuase of this particular marketing ploy. Looked good to the great unwashed though.....
15th Jan 2007 4:37 pm
COMMANDO
Member Since: 09 Oct 2006
Location: NORTH WEST
Posts: 67
MOBIL 1
Still- one million miles without an oil change is very impressive!
16th Jan 2007 9:55 am
Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
You mean you have to change it DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
Porsche Cayenne V8 Diesel S
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