Im interested in the QS powertrain warranty and buyback program for my Taco and 4Runner. I emailed them and included a copy of Toyotas verbiage allowing a thicker oil than 0w20 and they said in writing they will honor the warranty and buyback with the use of 5w30.
That said I've not used QS full synthetic before and I'm curious as to how the 5w30 version holds up. Use will be 10k oci in both vehicles. Is this formulation pretty fair in terms of piston deposits and varnish protection etc? Any ida on a HTHS?
I wouldn’t have a problem running it for 10 k in then4 runner. The Taco May be fine. I ran that oil in a 2.7 eco boost f150 at full 10k intervals. it seemed to hold up under that tougher engine condition, but i never tested the used oil. My concern I have is Soot and chain stretchin in the taco.. But it’s been a few years with this engine and no reports of issues. I am actually relaxing a bit on the issue It may not be expressing itself in this engine.lots of them going on and on with 10k bulk 0w20.
IMHO, the only way to combat soot and chain stretch is to reduce the OCI interval. My cheap, 4-cyl Equinox loves to load its oil with soot and eat it after 3000 miles. It needs changed right then and there -- at 3K miles. So, I've settled on QSUD 5W-30 changes at the interval. It's great oil and inexpensive. So much so that I won't feel ripped off at such a short internal period. As such, the engine/car will last as long as I care to keep it.
You will need to check your oil EVERY fill-up at the pump to determine what your OCI schedule will be. Perhaps a few rounds of oil analysis will help you make that decision as well.
BTW, my older Silverado loves QSUD 5W-30 as well. My Alaskan Silverado with a 5.3L Gen III L59 engine does well on QSUD down to -25 to -30 degs F. No problem.
And also, both vehicles like SOPUS' new product, RGT 5W-30, as well. I've recently tried this new SOPUS product in my Chevy trucks as their rebate enticed me. In the end, I'm sticking with QSUD, as its cheaper and does just as well it seems.