REDLINE RACING OIL synthetic 40W $8 a quart +/- ... Have used it for 18 months on the car... I change it every 2,500 miles since I run the car on the track a few times a month...

 

If you're going to store the car for the winter, change the oil first! Moisture combines with combustion by-products in the oil and will form acids that will do nasty things to your motor.

Why would you want to run 15W50 in that engine? The mechanical tolerances are so close that it needs a thin oil to get lubrication everywhere. If you start running that pancake syrup sooner or later you're going to spin a bearing or score a cylinder and then your beautiful Crossfire will become a lawn ornament because you're not going to be able to afford a new engine and there's no way DC will honor the 7/70 powertrain warranty when they see you've been running the wrong oil.

Quit being cheap and use the oil that the engine designers told you to use.

 

Between the oil temperature limits, combustion by-products in the oil and will form acids , we have given you every bit of intelligent information to make an intelligent decision!

 

I have to find the oil somewhere besides the dealership. I decided to let them do my first oil change since I was getting some service work done, not realizing how much they would charge. $103 for an oil change. That is freaking crazy.

 

It's actually not freaking crazy... The oil alone at Wal Mart will cost you $50 and a filter about $18 which comes with a new cartridge and O-rings. It takes longer to do a crossfire oil change than regular cars since the filter is up top and the plastic belly pan has to be removed to access the drain. There is a lot of raising and lowering the lift and they also have to reset the indicator.

 

I appreciate the help, but why did I get flamed for being cheap, that's uncalled for IMO. I didn't know about the tight tolerances, so that makes sense. BTW, how am I being cheap when the oil I bought is $5.99 a quart. I did find the 0w40 today and bought it.

 

Craig Auto Parts...is where I get my Mobile 1 motor oil at $4.50 qt.

 

Aero - I worked for almost 10 years at a motorcycle dealer that sells expensive, two-cylinder machines made in Milwaukee. You would be amazed at the number people I have seen who after having spent more than $15,000 for a motorcycle, refuse to pay $4.99 for a quart of 15W50. These guys will not use the oil specified in the owner's manual (Genuine HD or Diesel-rated) but rather go to Auto Zone and buy the $0.99 10W30. Then they come in after 10,000 miles and complain that the bottom end is shot and scream bloody murder when they find out that it's not covered under the warranty. I have seen stuff like this more times than I can remember.

When I saw your post I simply assumed you were one of "them" and for that I apologize. It just really torques me off when I see people who buy nice vehicles and then not take care of them like they are supposed to and I was trying to save you from yourself.

The machine work an metallurgy in cars and bikes today is simply amazing. For example, new Hondas and Fords specify 5W20. That stuff is like water but the clearances are so tight you need something like that to make sure everything gets lubed properly. Another example is BMW. They use a substance called "Nikasil" to line their cylinders with and it is incredibly hard. I once tore down a K75 that had 214,000 miles on it and you could still the crosshatching on the cylinder walls from when it was honed at the factory.

Bob...

 

All is alright Bob, but I thought that Ford went with the 5w20 so they'd get better fuel economy, thus raising their CAFE standards. I will be running 0w40 Mobil 1 in my ride from now on, but the guy at the oil change placed let me know that he now carries Amsoil 5w40, what do you think of that grade?

 

it sounds like you're gonna do what you want regardless of the all the advice and warning we've given, so just put whatever you want in there -- but the sticker on the motor does not say Mobil 1 0W40 or 15W50 or Amsoil 5W40...

when your lifters knock in the dead of winter and the you're wondering why, you can refer to this thread.

 

Boy: this turned into a heated discussion... I think he was just looking for 40W oil... Give him a break... I've been running Red Line 40W in my Crossfire for nearly 2 years and have about 3,000 miles of hard track time on the car and 18k total... I had the opportunity to pull the engine when my new cams were installed last month and the cylinders are in such perfect shape that you can still see the mfg. pressing marks.

Mobil Oil Co. constructed a deal with DC for the spec. of Mobil 1 synth. for the car... Do you actually believe it's the best product on the market??? Depending on your driving conditions you should look a other products... Red Line 40w has worked beautifully for this engine on the West Coast warm weather and running the car on the track twice +/- a month...

 

I would say you can run any brand you like as long as it meets the viscosity and duty-cycle requirements specified by DC. I don't have my owner's manual in front of me right now, so I'm not sure what API rating they specify but I'm guessing it will be SG or SH. But I do remember the only viscosity specified is 0W40.

As far as brand preference goes, I'm a Mobil-1 man myself but I have had good results with products from Redline, Royal Purple, and Amsoil as well.

 

Redline is pretty good stuff. Most of the race bikes I've played with ran it.

 

I had the opportunity to pull the engine when my new cams were installed last month.

What did that do for the performance?

 

Going back to the original post this link:

http://clients.mapquest.com/mobil1/mqlocator?link=find

It might be helpful.

 

I am very uninformed about Mobil 1 as I have never had a car before the XF that required synthetic oil.

By "0W40", are you saying 10w40 or is there actually an "0" in front of the W? Or are you saying Mobil 1 W40?

Thanks in advance.

 

0w40 is the actual viscosity of the oil.

 

Ok, thanks. I have never seen a bottle of oil that said 0W40 on it, but then I haven't looked for synthetic oil before.