It's the maker of that engine who says one is superior to the other for their engines. Not me. I wouldn't attempt to prove which one is superior to the other. Rather, I want to learn which one will be better for my engines. AND, the question was never about the expensive the better.
I doubt it. Honda doesn't get their reccomendation or pick their supplier by testing all of the off the shelf oils. They find who can make an oil that meets current standards the cheapest, probably (probably
) test it, and if it doesn't blow, then it looks like it'll become the OE oil.
IMO, oil companies have only a sales interest in their oils. Likewise, Honda parts salesman has a 'sales interest' in their own oils. But Honda's interest goes beyond oil sales - Longevity of their engines is in their best interest.
Sorry, but no. They're in the business (and just so happen to have interests
) in selling cars. They want to get you through the warranty period too. Sure, Honda builds good cars, good engines... but they aren't all sitting there spending money on R&D to make sure you can hit 400k on your K24.
I'm not an expert to contest Honda engineers' claim that their oils are better for their engines' longevity. Thanks for granting me on the OEM parts issue. Let's see here.....OEM Coolants, AT Fluids, PS Fluids are manufacturer specific, as we all have been told by the manufacturers. May be that's a sales pitch too and most of us 'fell' for it. I do understand that when it comes to oils, there's lot of debate out there and which oil you prefer is a matter of your personal preference. I'm not comfortable with 'one size fits all' generic oils and would go with those engineers who say their oils are best for their engines.
Having said all this, I'm always eager to learn more, as I continue to read more and discuss more with fellow members.
I'm sure that you find ISLAC and API certifications, along with Dexos and Ford WSS-M2C 930-A certifications meaningless... because a lot of these "generic oils" (Mobil 1, QSUD, Pennzoil Platinum, etc.) have them. But they probably have no idea what they're talking about.
Sure, engineers may know a lot, but I'd rather take advice from the guys on the front lines here... the mechanics at the Honda dealerships (and there's some on here) who know these cars inside and out, with and without daily use and abuse, with and without miles. They IMO would be the best ones to say what oil is truly the best. I bet they will say that the oil from the shelf is just fine.
With all of this said, there is nothing wrong with any of the Honda oils, they are just fine, but the point here is that it's really nothing special when compared to off the shelf oils.