iadr wrote: ↑Sun Dec 02, 2018 9:09 pm
Bazman, I don't even know where to start-
200,000 km is
half what we expect from a modern car here in Canada (and the US I'd assume). I don't know where you live, Holland maybe? But you just don't get the need in other parts of the world, for durability.
We who are critical, are not talking faults in an evolutionary design like the LS, but the complete crap like the "High Feature" 3.6L engine in GM SUV's.
Recently, I was tasked- I work in the service industry- with finding a good used replacement motor. Through all searches, the nearest one that was worth buying was 3,100km away. And even then, with 101,000km on it the dealer parts guy strongly recommended doing a "front end rebuild" (his words) with revised components, re-engineered after approx 1.5 million of these motors had been foisted on the customers.
Because of demand, the motors are worth more than the 5-6yo vehicles they are found in.
That is the GM we speak of- a company so badly managed as to lose market share year after year, take 11.2billion dollars net government funds, and produce vehicles with half the life expectancy they rightly should have.
Go on Bob is the oil guy and read the hundred+ post mortems of these V6 motors. Buy one yourself, and you will see our point. You and Newold are consumers. Armchair observers, honestly. Don't arrogate your expertise to think it on the level of those of us on this board who do service work for a living.
And yep, I worked for an MB dealer and have replaced 6.3 and 5.0 V8's for failures.
Currently, I work for Mazda, and if their 2.3 DI turbo from back in 2007 is what the industry is facing, I will be forced to leave said industry. Daily calls of failure. We'd rather the clients gave up and junked the CX7's.
The Bob Is The Oil Guy forum is full of frickin' morons who think stupid things like "oil doesn't wear out" and don't change their oil until an oil analysis tells them that the oil is used up. Of course people on their forum will have a lot of problems.
In the real world, that has people who aren't complete idiot spendthrifts, if you have a High Feature and change the oil every 3-5000mi, they last a good long time. I have a few in my care that are well, well beyond 200k km on the chainsets that GM installed on the assembly line. The common link with them all is REGULAR OIL CHANGES with GOOD OIL, period. None of this 15-20k mile ridiculousness.
The biggest problem I see with the High Feature engine is people who believe the "Oil Life Monitor" and drive the car until the monitor reaches zero, or the oil pressure light comes on because the engine is five quarts low in a six quart system, which ever comes first. If you actually maintain the cars, instead of training them to run low on oil that is half contaminants because the oil life monitor says it isn't due yet, then the engines have no problem at all.
The "oil life monitor" system is mostly a way to make people who lease a vehicle feel good about low maintenance costs. What do they care, they will be turning it in after 3 years, after that it's someone else's problem. Almost as bad as the apparent German attitude of, don't maintain a car, you should replace it with a new car instead because new cars are more efficient than the two year old junk you are driving.
The DISI engine is a typical Mazda somewhat-underengineered problem child, and I say this as someone with a long history with Mazda. (Currently own two RX-7s and a twin distributor RX-3, have had three other RX-7s, always at least one in my life since 1998) The biggest issue with the DISI is that Mazda tuned the engine to the knife edge of what the high pressure fuel pump could keep up with when everything is new and in perfect working order. After some entropy happens in the HPFP, you find yourself getting some rod-shattering detonation at low RPM because the tiny little turbo can spool up faster than the fueling can keep up. Notice that Ford, who uses the sam architecture but Bosch direct-injection components and less specific output, has no problems from their 2.0 Ecoboosts.
