I know a guy that is a very well respected and in high demand high end euro car technician and he and others in his field think the 10k OCI specified by several of the OEM's is the cause of several of the problems he sees, (one being early failure/problems with cam chains and guides).
I am sticking with a 5k OCI on my 2.7 ecoboost as I like it and I may keep it for awhile (10 years).
My 2007 Tundta 5.7 had a OEM recommended 5K OCI. My 2013 Mazda3 sky active 2.0 had a OEM recommended 5K OCI. The current Tundra with the same 5.7 has a 10K OEM recommended OCI.
Are the manufactures under pressure from the environmental agencies to lengthen the OCI?????
I am probably going to switch the 2.7 EB to the Rotella duel spec ck-4/sn 5w30 when it comes out. It starts out at the heavy end of 5w30. The oil sheering we are seeing bothers me.
I may also try the Max life high mileage 5w30 that is a heavy 5w30. It is ~$23 5qt jug at wally world, so about $36 per oil service for 6qt and $8 filter. The PUP and filter was costing me $42 but that is up to $46 now.
Originally Posted By: pbm
Originally Posted By: CT8
Originally Posted By: Strawdog
Originally Posted By: bbhero
Is that why Ford now goes with a 5w30 in them?? Would seem there was an issue so they went up from a 20 viscosity to a 30.
I was thinking the exact same thing.
You would think with all the testing the engineers did in pre- production this topic came up.
On the other hand the long OCI recommended by the OLM may be somewhat environmentally based.
Two things come into play ,
1] How can $200,000.00 worth of parts be assembled into a $50,000.00 pile of junk?
2] How can a vehicle that the designers and engineers found bulletproof in all kinds of use and abuse be broken by the a woman?
When I bought my new Chevy Cruze in 2011 I was assured that it was among the most (preproduction) tested cars in GM history......that didn't stop it from having coolant loss/smell issues (that warranted a class-action lawsuit)....not to mention that GM quietly 'recalibrated' the over enthusiastic OLM for 2012 after seeing what the turbo did to the oil. In other words, all manufacturers make adjustments...and mistakes.