rodsky

dont agree.

but if you're going to say this - what did they change to solve the problem - i'd like to know.

my car does not use a lot of oil - less than my 996 as an example. and less than my 964 and 3.2 ( that i no longer own)..

rodsky

i have this on my 2009 - it was however an option that you had to pay for called UAI.

PJorgen

Maybe he meant a RAPID dog, like a greyhound.

Keadog

Thanks, fun read. I am concerned about iPhone integration, but I'm looking for cars with NAV, Bluetooth and UAI as a minimum in "comforts". Thanks for all the info.
I just got back from Penske Beachwood and got to go in the back to see their 2 launch cars - a pretty heavily optioned Platinum Silver/black ($127K) that I got into and a Black/black that was still being detailed for Thursday night. I like everything but maybe not the bulbous headlamp covers. Seating and the console controls access felt good to me. Looking forward to the reception...

rodsky

Crickets?

I'd still like to know what they changed from 2009 to 2011 to make the "alleged" oil consumption go down. That would be of interest to me as i have a 2009 - albeit i must be one of the lucky ones not to have the "alleged" oil consumption.

equ

FWIW, my '10 997.2 has not used any measurable amount of oil in the last 3k miles.

SleepRM3

Another great thread on the differences between 2009 and early 2012 997.2s. I'm looking at 2009 997.2 Carrera S https://www.pca.org/classified-ad/306822 It has low mileage, but I'm wary of the first-year 9A1 DFI engines. My short list appears to be: look for an updated high-flow fuel pump, check on oil consumption, and have the owner pull a DME readout? It seems the 3rd radiator only came with the PDK optioned 997.2s? Other suggestions would be appreciated! FWIW, I've read in Pano of a DFI engine (2009/2010 Cayman S) being dis-assembled only after a 2 years of (DE) use - high cylinder wear was already apparent; seems spraying fuel directly into the combustion chamber increases wear rates in these DFI engines - maybe high oil consumption is designed-in to maintain some lubrication in the combustion chamber? I have no plans to track the 997.2 S - it'll strictly be a road car.

Carmichael

Wait, I thought the DFI system on the .2 cars had the injector directed toward the back of the intake valves when they open? If anything, I would think that would lessen the chance of washing out the oil film on the cylinder walls.

snake eyes

You people are overthinking why the 2009 is less than the 2010+ 997.2
The first model year of a new car is always worth less than the other years.
why?
Because people believe (common not 911 folk) and it is true to some point that the first year is inferior (has bugs and quirks). By the second year of production these bugs (service bulletins etc for real life testing are sorted out on the production run)
Hense why a 2009 is worth less than a 2010 even though they are exsactly the same car in this scenario

jeffrec

I have a 2009 C2S which I bought CPO in 2012. I was at the dealership where I bought mine a few months ago and had the itch to perhaps look at a newer model 2012 997.2. The sales manager, who I have bought a couple of cars from and trust, tells me "why would you buy another 997.2 when you have the car with the options you want"? That from a sales guy!!! He said that there isn't a whole lot of difference between 997.2 2009 and 2012 with the exception of a few enhancements and the longer CPO warranty.

Also, regarding oil consumption, I am only adding one quart of oil for every 4000 miles driven. For what it's worth, not that it matters but I use Motul oil.

Wayne Smith

See if this diagram posts.

Likewise, no reports of buildup requiring Walnut shell blasting.

SpeedyD

They didn't change anything. It is internet speculation :-) No foundation required.

Wayne Smith

I had heard the steering wheel didn't update until 2010, which was alluded to already.

Sounds like the OP may have a good lead on the less expensive 2009 if all other things are equal. Good luck with your purchase.

Ericson38

I like DFI, but there are two areas where longer term side effects can bring their own issues.

1) What ideally should be going through the intake valve port and around the seat of the valve is dust free air, and not laden with hydrocarbons. The valve is hot; not as hot as an exhaust valve for sure, but is a great heat sink in any case. What is added intentionally to that air stream includes engine oil from the crankcase (blow-by) via the PCV system and exhaust gas from the EGR valve. Both of these contribute to intake valve and seat carbon buildup. This increases pumping loss initially (back of tulip valve) with increasing possibility of a hard portion breaking off mid stroke and imbedding into the valve seat upon closing. At some point in the life of this engine, the oil load from blow by is going to load up on the valves to the point where a valve job is required, possibly while the pistons and bottom end still have a respectable number of good miles left.

2) what happens when a DFI injector gets partially dirty (effecting the spray pattern) and some gasoline is sprayed directly on to the cylinder wall adjacent to it, washing off the micro oil layer ? Maybe this is not possible, if the spray is timed to be completed with the piston within a few degrees before TDC.

OTH, Diesel fuel is a lubricant (which is why mechanical HP jerk pumps are possible), and dirty injectors and bad patterns typically result in unburned fuel and sooty exhaust.

Gasoline is more a solvent, and unburned fuel wouldn't be as likely to be present at the end of the stroke, but detonation could, possibly, occur, repeatedly, in one area. That could cause heat build up to the point of scuffing (material exchange), if it is persistent on one area of the piston, over and over, from a semi permanent injector spray pattern change. Piston skirts are getting shorter, combustion pressures higher, and side loading (force per unit area) of piston/wall in contact is increasing.

The automotive world is going DFI, no question. Meanwhile, the mechanical choke on my 1970 428 CJ Mustang really washes the fuel off the 4.13 inch bores during start up, no question. It gets driven 1 mile for every 100 of the P car, about.

Robocop305

Buy the 2009. Is the same thing!