Can you blend synthetic and "real" oil

[Z71]

our 05 int dump truck came with syn all around.. gear case and all. that count?

Don't know, my 2010 lubricant cross reference guide makes no mention of synthetic oil being factory fill. It also references 4 diesel engines used; Caterpillar, Cummins, Detroit Diesel & International.

 

[Soundguy]

i can tell you there were labels on the oil fil s all stating to use synthetic oil only !

first time i had ever seen that.

i'd have to find out engine type.. thinking international.

 

[jimgerken]

Some of the vehicles that come with synthetic from the factory do so because it is the only way they can keep them from breaking down due to the extremely high underhood temps. The Corvette, for one. Some are using synthetic from the factory to lower the friction so they can make their published fuel efficiency numbers.

Reading between the lines, I gather now that more and more engine cylinder walls are honed with plateau finishes, the need for a true breakin period is less, so putting in synthetic at the factory fill is more common.

 

[buickanddeere]

Yeah, the old "break it in on dino to seat rings,bearings,etc" is an old wives tale. Many new and very expensive vehicles come from the builders with synthetic oil

If the engine is properly built then synthetic can be used. There are engines that do require a break in oil that lets metal to metal contact occur to seat rings.

I put synthetic in a new car and it took 75,000 miles before it quit burning oil.

 

[Diamondpilot]

Curious, what kind of truck came with synthetic oil?

My 2008 Nissan Titan came with 5W30 Valvoline Syntech from the factory.

Nissan started synthetic in 2003

Chris

 

[Car Doc]

Harley puts syn oil in their high performance factory CVO engines but dino in the rest fwtw. I switched to syn oil in mine and I now use a qt between changes. Fact it may be tapering off as of the last change but it is not a huge deal it may quit may not time will tell. Air cooled engines have varying clearances and temp swings is my reasoning on the phenomenon.

Honda hybrids all come out with Mobil-1 0-20w is one car I deal with that is syn only and I believe Toyota is using the 0-20 syn in cars for sure. I haven't seen that new of a truck yet to know as of I am pretty sure 2012 a least if not earlier.

 

[AKfish]

My 2011 JD5075M came from the factory with synthetic break-in oil. Deere specifically states in the Owner's manual to NOT change out the oil until 300 hours on the engine. After the break-in period - you can use whatever oil you want - as long as it meets or exceeds the SJ specs.

I'll probably stick with synthetic...

AKfish

 

[MorningViewStables]

AKfish, my manual on my 5075M has the word "maximum" on the 300 hour first oil change and the dealer suggested I change it at 50hrs (although the dealer has a vested interest).

 

[murphy1244]

I find no reference that says Mobil 1 is used in Ford Trucks, please state year make and model.

My father in law works at the Brook Park plant and Mobil is their supplier. Ford F250 2001

 

[jimgerken]

AKfish, my manual on my 5075M has the word "maximum" on the 300 hour first oil change and the dealer suggested I change it at 50hrs (although the dealer has a vested interest).

Wow, everybody has a different opinion. My dealer has encouraged me to at least double the recomended 50 hour first oil change on all three of the CUTs I have purchased. He says that a lot of people don't actually work the engine enough to do the breakin correctly, so he asks that we double the time. Driving it around, using the loader, even mowing lawn does not tax the engine, he claims. In my opinon, some heavy PTO use (like a large brush chipper) would be nice, or hook it to a field disk or digger and pull as hard and as fast as you can for an hour or two (again, my opinion). You get one chance to do it right.