Rotax 912 (all) series SB

[BurnieM]

US 91 octane (AKI) approx equals Aus 95 octane (RON)

[skippydiesel]

Friction modifiers have been around as long as man has wanted to make it easier to move one surface against another -be warned,  even those that work, may NOT BE  COST EFFECTIVE.

[facthunter]

 Oil  additives do wear out but I'd rather change the oil  as the other effect is controlled by blowby.. The oil still  accumulates acids from combustion products. Nev

[Garfly]

1 hour ago, skippydiesel said:

If this guy didnt oversell every point, the video would be 75% shorter.  A real endurance effort to get through it - I failed.😈

Here's the short version, then. 

 

Which I, for one, wouldn't have deemed credible had the passionate guy in the long version not done research and produced receipts.

 

(You're welcome ;- )

 

 

 

Edited December 1 by Garfly

[facthunter]

Most of the engine wear is in the warm up Phase. Taxi's do 3 times the engine mileage of the average car . Engine rebuilding is confined to Collectable older models.  That Industry is a shadow of it's former self. By the time your engine is cactus the car is not much good either. Modern cars engine life is quite high, even smaller ones unless  they have an inherent fault that reflects in their resale value/. Clutch and brake wear  reflect user driving patterns.   Modern cars are pretty good seeing no one particularly looks at them till they stop.. Nev

[Moneybox]

You have to wonder how much of what we're told about oil life is fact or fiction. We owned an Iveco with a 3L turbo diesel engine. Distance between oil changes was factory recommended to be 40,000km and these engines have a very good service record. I know people who change their engine oil at 5,000km, no wonder we have a high carbon pollution problem.

 

If one turbo diesel engine can run reliably for 40,000km why has the oil run its life at 10,000km in other engines? Of course the same applies to aircraft engines. I was watching the Moonie Germany to Australia movie where they change the oil at 25hrs, it's only just getting warm.

[facthunter]

The Iveco probably holds more oil and it would be an ED (extended drain with more additives oil) type of oil. most likely on oil analysis. The Renault Trafic is 30,000 kms between oil changes.. I think a large(r)filter would give more assurance. Oil doesn't wear out. Additives may.  Oils can be re refined.  Nev

[RossK]

19 hours ago, Moneybox said:

If one turbo diesel engine can run reliably for 40,000km why has the oil run its life at 10,000km in other engines? Of course the same applies to aircraft engines. I was watching the Moonie Germany to Australia movie where they change the oil at 25hrs, it's only just getting warm.

Engine design does come into it.

We run 2 late model V6 commodores, and from what I've heard is that the piston-bore clearance was enlarged to reduce friction and improve fuel ecomomy.

These are the dirtyest engines I've seen, 10,000km and the oil is black as black. They are also known to be oil burners, 1-2 litres every 10,000 is common. Holdens spec for them is up to 3L/10,000km - thats nearly half the sump capacity.

Very reliable and fuel efficient, yes. But I dont run them to the 15,000km suggested service interval without an oil and filter change.

[skippydiesel]

My local Holden dealership tormented me (knowing my passion for almost all things diesel) with the suggestion that Holden was considering fitting their 6 speed (manual) ute with a 3L turbo diesel  - would have bought one for sure.😈

[facthunter]

If the oil gets dirty, it's bad sealing rings and/or rich mixture. The extra clearances were applied to the LAST of the first Buick derived engines. GM Aus made One size piston for ALL bores to save money. ie No class sizes and selective fitting in THOSE motors so extra clearance had to be allowed and those motors were a bit more mechanically noisy .Nev

[onetrack]

Worn oil rings will also produce dirty oil very rapidly.

[facthunter]

They pretty much all use the same type of Oil rings these days. IF they use much oil they don't meet emissions standards. You hardly ever see  a car blowing BLUE smoke.  There are a few with stuffed CAT. Converters. Late Models that STINK. (Petrol) engined.  Nev

[Moneybox]

I bought a new Subaru Forester in 1999. My brother came with me to pick it up and he asked the salesman if we could look under the bonnet.

He said "What for"?

Merv said "We might want to check the oil and water".

The salesman said "Don't bother, bring it back at 15,000km and we'll do that".

It was that good too. The automatic transmission was getting a little lazy changing at 220,000km so I asked the transmission workshop who used to overhaul our Hummer transmissions to take a look.

He asked "How many kilometres has it done"?

I said "220,000".

He said "Well there's nothing wrong with the transmission. When did you change the oil last"?

I said "It's never been done".

He said "Well the oil is stuffed. Give it an oil change".

I did and it ran like new. Remember that old Castrol ad 'Oils aint oils'. Synthetics wear out, oils just get contaminated.

We sold it to a friend at 470,000km and it was still a very good vehicle.