Originally Posted By: TP4ME
Originally Posted By: SteveSRT8
We ran bypass filters on fleet trucks for many years.
Seriously, on most newer cars there is no real ROI, as the additional expense and UOA's will eat up your meager savings.
Modern oils and good filters have taken away the benefits for the ordinary driver.
I don't agree. Some modern engines have inadequate crankcase ventilation due to the mfrs. trying to meet environmental standards on the cheap. Take the Toyota Sienna for example: years of "engine sludge" problems caused by inadequate ventilation, which Toyota would never admit or explain.
A bypass filter is an excellent idea for engines like this, and a filter with an electrically-heated evaporation chamber is an even better idea to vent the gases that cause the problem.
Sorry, but no agreement here. We just sold a fleet truck with over one half MILLION miles on it! No smoke, no noise, no consumption, still working in another state today.
The oil was changed by the OLM from new, never any special care. And our duty cycle voids warranty from any other mfgr except GM.
I have bought an awful lot of stuff in the aftermarket, if it makes you feel good then do it. It's your car. But on most typical cars and trucks there is no measurable benefit. Of course there are special cases, but the average car is not involved.
If there was we'd be doing it, as this is how we eat...