Porsche 928S4 on Shell Helix Ultra ( No 3 )

[quadrun1]

Hi Doug,

Very interesting discussion! Can you provide some insight as to your choice of Delvac 1 5W-40 in the Subaru versus M1 0W-40 in the BMW and VW?

I thought all Subarus were boxer gasoline engines, or do they offer a diesel engine option to you guys?

Also, any word from Rennlist on how M1 0W-40 has been holding up in Porsche turbo engines?

Thanks,
Jason

 

[Last_Z]

Posted by REXMAN;

quote:

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First, only 15% of the 7038 miles on the Shell are what we Americans would consider "stop-and-go" driving. The remaining 85% are easy country and highway miles which are VERY kind to the engine when it comes to wear.
Heck, a dino would look good with this kind of driving! The fact that Doug is running synthetic here is icing on the cake.

Second, Porsches, being the wonderfully over-engineered cars that they are, are famous for having very large oil capacities. The 928S as I recall holds around 9 quarts--that's a whopping 50% *more* oil than most cars of this type! That extra capacity is going to make these wear figures look 50% better than they would otherwise!

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What about the Camry?
Rick

 

[Doug Hillary]

Hi,
Quadrun1 - I have stocks of D1 and I believe it to be the best oil around - for me

The BMW Z3 2.8 has been on M1 0w-40 from new and stayed on it because I had stocks. It does not use any oil and has 51kkms on the clock. These are really beautiful BMW engines. It be will moved on to D1 after the next OC in a couple of weeks time as summer approaches

My MY02 Subaru Outback is a manual 2.5 boxer. The Subaru was started on M1 0w-40 at 4kkms and had two OC. It never used oil between the 15kkms OC intervals
I moved it on to M1 10w30 at about 33kkms. Then it always sounded very noisy at startup - and slow to get pressure up - and it also started to consume oil at about 1ltr per 5kkms.
The OC intervals were still 15kkms
At 66kkms I put it on to D1 and it has been excellent again ever since - no rattles and almost no oil consumed during the 15kkms OC intervals. It now has 90kkms on it

I would like to use D1 in the Porsche too but it has been excellent on the Shell and I still have stock on hand for about another three OCs

The Porsche group here in Australia mostly use M1 0w-40 and I have never heard any complaints. Most BMW dealers here use M1 0w-40 too - it has a really good reputation here in Australia

Castrol is now pushing their Castrol R 0w-40 over their obsolete SLX 0w30 and their new Castrol R 5w30. Interesting

Regards

 

[sprintman]

Doug I currently have 5W30 dino in my 2.5 Outback doing a rinse after RX and it sure does rattle at startup. Never did that with D1 that I installed day after I bought it some 13,000kms ago. Rattle and general noise was even worse when I ran 10W30 in my Mazda turbo. XW30 are just too thin I believe. 5W40 is my current preffered viscosity. Oh and I ran 0W40 Mobil Trisyn in the Mazda for a while but excessive consumption put me off. That was before a 3-bottle RX cleaning regime so it could be different now.

 

[Doug Hillary]

Hello,
we are both on the right "Bondi Tram" I think!

The Bimmer sounds quiet on the M1 0w-40 and the VW Golf does too

I think the D1. or M1 0w-40 ( or another 5w-40 ) is great stuff in these Subarus.

I was looking to sell it and nearly traded the Bimmer and it on a new SLK Benz Kompressor. A mate has a SLK 320 - I simply could not justify it

So, the Sub will be with me another year and it will stay on D1.

It really is a great and very under rated car. Excellent for very long higher speed trips - enough power, excellent lights & good aircon plus magic handling to go with it. I'll replace the t/belt and Bosch "old style" Platinums at about the "tonne"

Regards
Doug

 

[quadrun1]

Thanks for the explanation, Doug! I'm a bit surprised that you experienced increased engine noise with the M1 10w30, many here seem to favor it (over the M1 0W-40 for example) due to its ability to maintain a relatively constant 100'C viscosity with use. Glad you were able to fix that noise problem with D1. I cured a nasty valve clack in a Mitsubishi 3.0 V6 with M1 0W-40.

 

[Doug Hillary]

Hi,
quadrun1 - what model Mitsi engine - the older single cam 3 ltr?

 

[Shannow]

I think that engine noise is a matter of perception, and what you are used to.

I used M1 0W-40 in my 1990 V-6 4Runner, and thought that it sounded like a metal bucket of ball bearings, compared to the xW-50s that I had been running previously.

Delvac 1 stops the noise.

We have all "learned" on thick oils, and are finding thin oils hard to take.

But in general, when an aussie car hits 1 litre per 5000km, we start to worry that the engine is gone, while other markets view 1 litre per 1600km as normal consumption.

The buick V-6 in our commodores had exactly that issue, when engines died between 6k (mile) oil changes by running out of oil. Aussie motorists did not ever expect a car to use a dipstick full of oil between scheduled services. Holden increased sump capacity, and extended the dipstick length to compensate.

 

[Doug Hillary]

Hi,
Shannow - I agree that engine "noises" are sensitive issues perhaps on this type of board. For me and with by background in Auto Engineering I simply cannot accept that an engine that is quiet on one recommended oil and not on another is best on the noisiest! It is simply against my better judgement

Of course if such a noise is simply a valve train driven one I would not even consider a change. Auto lash devices can be very sensitive!

You are correct about oil consumption. Many people have difficulty accepting what engine makers accept as "normal". They expect zero oil consumption. Porsche say that up to 1.5ltrs/1kkms is acceptable. Some cars can use as much as 2ltrs/1kkm until "bed down" is complete. The owners want their engines rebuilt!!!

Benz and other engine makers - especially German - have an oil/fuel used % factor as the ultimate use parameter when under warranty. This especially applies to heavy diesels when owners complain of high oil use - and allows for use factors

As for using M1 0w-40 in turbo Porsches' the later group of liquid cooled engines call for it - it is the factory fill.
And most owners use it too, along with a range of other "Porsche Approved Oils" - all synthetics, some are 5w-40. The lighter viscosity is called for because of the valve train's needs. Porsche still advocate their long oil drain periods

Owners of the older air cooled turbos seem to prefer M1 15w-50 and with some justification too considering the elevated oil temps.

Regards

 

[quadrun1]

Yes, if I'm not mistaken the engine is a Mitsu "6G72" 2972cc 24 valve SOHC V6, used in the Eclipse and Galant here.

I think we all strive for quiet engines which consume no oil but unfortunately it sometimes can be luck of the draw!

 

[Doug Hillary]

Hi,
Quadrun1 - I know of this excellent engine. I owned three 6G72s in Mitsubishi Pajeros 4x4s ( your Montero? ). Totalled about 250000kms in them 1990-1993. They were fitted with an oil cooler, they have roller tappets and are "silky" smooth when matched with an autotrans

I used Castrol R 10w-60 in mine as I spent a lot of time in the Tropics then, on longer runs. Oil was changed each 12000 miles

Good to hear that the M1 0w-40 works for you - it certainly appears to be a very good oil

Regards

 

[sprintman]

Doug I have NGK Iridiums in Outback and Mazda. Very impressive. Check out the new Forester turbo when you replace OB. 0-100 6.6 and quarter in 14.8 seems more in keeping with your other vehicles?

 

[sbc350gearhead]

0-100 6.6 with a et of 14.8......huh?

or is that kilometers?

[ September 03, 2003, 07:21 PM: Message edited by: sbc350gearhead ]

 

[Doug Hillary]

Hello,

sprintman - my son has some Iridiums in his VL Commodore and reckons they are tops too

I'll test a "hot" Forrester when I'm next in Bris. as all reports are excellent for this hot baby

Regards

 

[sprintman]

SBC350 that's km's. New turbo Forester is hot and off-road capable. When OB lease expires this looks like a good replacement. Turbo insurance is a worry though.