[Eiko]

I think the ecoboost takes 6?

5.9 qts if you want to be nit picky. The 3.7 is 6 qts. So either way they'll get you on the added charges.

Off-topic: Why do diesels take so much oil?

 

[Eiko]

Thanks, I'm not clueless on engines (apparently only gas engines) but just assumed the diesel high pressure injectors were electric.

The gasoline direct injection engines don't use oil pressure to run their injectors which are running I think like 2 or 3 times higher pressures.

 

[Eiko]

Then ya - they have more oil to carry heat away and to handle more particulate load. I am corrected!

That makes sense given the high compression ratios they run. Just remembered I do have experience with diesels. My dad's Mercedes 240D and 300TD from the late 1970's. Excruciatingly painfully slow and just painfully slow respectively.

Coulda sworn someone was talking about 50,000 psi fuel injection pressures somewhere, but nevermind then.

 

[Eiko]

My buddy's 2001 Audi A8 has a factory 10k oil change interval. 16 years and 215K miles and it's still going strong. I'm set in the old ways so I still cringe at the 10K interval. His is the 4.2L non turbo V8 but for my turbo 3.5, I'm going to do 5K changes which is still longer than the 3K changes on my old twin turbo car. I'm also not going to hit 1000 miles before I leave for CO so I'm going to do the breakin oil change at 500miles.

I do use synthetic oil on the turbo cars, even my garden tractor which is nonturbo. I don't use it on my really high mileage cars, >200K or the Subaru which just leak it out. I go with the cheapest synthetic which is supported by that Blackstone Labs report. I think it was Ophus who pointed me to that. I figure oil experts know more about it than I do. If I find WalMart has the cheapest synthetic, I'd buy it.

 

[Eiko]

Eiko,
Any car that has a fuel dilution problem either due to engine design or how it is driven should go for shorter oil changes, end of the day the oil is cheap.

I buy my 5 qts for FULL SYN oil for $10 or less after rebates etc. Right now mobil 1 has a 10$ rebate

Leaky rear main seal after I put the engine back into the car so evidently I munged up the new main seal. Not really excited about replacing it again.

Mobil 1 isn't $10 for 5qt after rebates, is it?

 

[Eiko]

i can not find the Blackstone labs newsletter i linked before, so take your pick:

https://www.blackstone-labs.com/newsletters.php

It was the July newsletter you linked to that I saw.

 

[Eiko]

Anything produced after 2000 should have a very tight motor and minimal oil fuel dilution. See Toyota's million mile 2UZ-FE teardown for instance... It would still pass Toyota's QA today as a brand new engine. My 404,000 mile 2UZ-FE is a great example... I change oil like, whenever, it gets run hard and put up wet and still performs like new.

I would hope in 2015 and newer Ford can employ the same production tolerances... but that's a hope!

Most of my cars are pre 2000; 1987 to 2000. Newest used to a 2003 but that was a Chrysler product so I wouldn't count that as a modern engine.

If Ford makes engines like they painted the inside of my Transit in addition to missing or not in place fasteners here and there, an incredibly crappy job of putting the foam gasket (completely unimportant other than what it says about quality work) under the rear AC vent, there's no hope.