*The approach I take to reduce IVD in my GDI engine :I will argue that the sulfated ash (SA) level -- that is the metal content of an oil -- does not matter for intake valve deposits (IVD) in gasoline direct-injection engines. The IVD is mostly composed of coked base oil with ash (metal) additives that doesn't evaporate. It also contains some exhaust particulates (from EGR) etc. However, since the primary building block of the IVD is coked base oil, how much would the SA level really make a difference? The base oil makes roughly 80% of the oil, whereas the ash is only about 1%. Therefore, I will argue that since the IVD is mostly coked base oil, the ash level has a small effect. In order to combat the IVD, the following all help: (1) Higher-quality base oils, such as PAO and POE, or the poor-man's higher-quality base oils such Group III+ and GTL. (2) More antioxidant to reduce the oil coking. (3) More or better detergent and dispersant to keep things clean. (4) More POE or AN to increase the solvency of the oil, which could loosen up some of the coked oil. There doesn't seem to be any research on this other than a faulty Lubrizol field study that compared a superior (Euro IV) low-SAPS oil to an inferior (Euro III) full-SAPS oil, which obviously favored the Euro IV oil, regardless of the SAPS. Any thoughts?
I don’t think tier 1 gas makes a difference. I’ve used cheap 87 octane gas to clean tar off my hands. It’s not like chevron with Techron would’ve made a huge difference. I don’t buy into the scam.*The approach I take to reduce IVD in my GDI engine :
1) Synthetic oil with low VII's (Valvoline Advance , QSUD , etc.)
2) Use Tier 1 gas
3) Use Fram Ultra oil filter
4) OCI with above mentioned oils of less than 5,000 miles / 4 months .
5) Use CRC Intake Valve Cleaner every 12,000 miles
6) Keep air filter and spark plugs clean and in good condition .
7) Keep PCV clean and operating properly.
8) Keep RPM's up and don't lug engine around town below 2,000 RPM's while driving except maybe on a long interstate drive .
9) Spirited drive on the interstate at least once a month for 15 ~ 20 minutes at 4,000 RPM's
*Not sure of how many of the above actually work to help lower IVD in a GDI engine - but it's what I do ...
hurry up and buy a MPFI before they stop production. That's why I bought my V8 Tundra earlier than I was planning to because I was afraid Toyota will stop making that engine.the only way to avoid ivds is going full electric-)
Seems that way!hurry up and buy a MPFI before they stop production. That's why I bought my V8 Tundra earlier than I was planning to because I was afraid Toyota will stop making that engine.
Worst case scenario I may consider a port injected DI but never a full DI.
If I ever have to decide between a full DI or EV ... tough decision, I may get a horse.
What’s HPL’s position on how IVDs happen and what can be done to minimize them, or what should Joe Average look for in oils for cars prone to deposits?Because with respect to after treatment, if the oil stays in the pan like it should it no longer matters
So I understand correctly that midsaps was really introduced mur because of the exhaust aftertreatment? Cars without particle filters would still be better served with a fullsaps?Because with respect to after treatment, if the oil stays in the pan like it should it no longer matters