Recent content by Chumango

JASO FD Certified oils https://www.jalos.or.jp/onfile/pdf/2T_EV_LIST.pdf

Are you saying that Stihl obtained IP from other manufacturers for these technologies from a court case, that they did not develop it themselves? Based on the discussions above about 4 mix engines and Echo and Shindaiwa blowers, I checked the manual for my Shindaiwa EB610RT blower that I got...

Dirt and grit carried by water wears the rocks

I worked for a number of years with some engineers who did HAZOPs and design support at a couple of refineries in the Billings area.

You said it better than I did, but that's what I meant. And CA definitely has a different spec. It depends on how fast you're driving as long as the tires are not severely under inflated. At low speeds, aerodynamic drag is relatively unimportant. At high speeds, aerodynamic drag dominates the...

The blend is different in CA, and I think only CA refiners provide it. The different spec, captive market, and high taxes all contribute to the high pump cost. This is exacerbated by refineries in CA closing down recently. I don't know if other states or regions have specific requirements, but...

Competition? When I say the same price, I mean within a penny or two either way. I tanked up at Shell yesterday for $2.22. Everyone else in the area is close to that. My wife paid $1.99 at Costco last week, but they have their own pricing structure. Costco has a more significant detergent...

Maybe it's naive, but I like to take a more optimistic view of the car makers in this case. They have a vested interest in that they don't want to have a reputation of cars that don't run very well. I don't know how to find out if the car makers get any money back from what I presume the fuel...

Compared with engines that we were known to not use Top Tier fuel?

Maybe true, but AAA did the test according to a standard. As you note, any given engine/use pattern might give different results, but a standard is a standard to...standardize, hopefully eliminating spurious variables. Looking inside an engine or two that were not subject to a standardized test...

Chevron and Shell are the same price as any other name brand in my area regardless of whether they are Top Tier or not. Where my brother lives (CA) Chevron is significantly more expensive than all other Top Tier. The auto makers sponsor the Top Tier program. They don't sell the fuel, so I...

I saw that video and the results of the AAA test. I was just curious if there are other tests that disprove what they say. I don't know why the car manufacturers would care about it enough to create the standard if it makes no difference. I suspect they did their own testing that showed the...

Just curious how you come to that conclusion. Are there test results you can share?

The summaries of studies I have seen show that Top Tier does make a difference. I'd have to look to find them, it's been a while. Otherwise, why would car manufacturers create and promote the Top Tier standards?

Top Tier cares about the detergency, which allows a range of compositions that meet the proper overall burning characteristics. Top Tier requires roughly 2-3 times the detergency than the minimum required by the EPA. In my area there is a pipeline terminal where I think all the brands and off...