Search results

Correct - Volvo went against the conventional approach and specified ACEA A5/B5 for diesels before they launched their own specification. I think they ran large DPFs which were less sensitive to blocking.

Oxidation by FTIR peak can be tricky if there is another species present that masks or overlays it.

Exactly this - Asian OEMs tend to have a single supplier of their oil, that is effectively then the 'approved' fluid although there is no published specification or approval process. The best that any other suppliers can do is carry out equivalence testing, vehicle testing etc to come up with a...

The Arrhenius equation (not "Arrhenius rate law") doesn't state any such thing. Here's what it "states": There's no mention of lubricants or oil life. Each chemical reaction taking place within a lubricant will be subject to this law (as well as others) and the overall effect may well be as...

I've taken to smashing them, so use a pan indoors or a flat plate on the grill. A smashed patty cooked quickly on a hot surface has a great combination of caramelised exterior and juicy interior.

But there is more likely to be a xW-4 and xW-2 before getting to xW-0 (which I don't think will ever happen).

I'm still not seeing the need for a car. Good clothing, decent footwear and some sunscreen maybe.

Volvo bag hook on our XC40. It folds out for use.

That's a bold claim. The OEMs own the IP and rights to the specifications and approvals that they develop and administer and whilst some may choose not to endorse their rights, others do. Just using the term "BMW" is using BMW's protected brand and if you don't have their permission then you...

There is a lot more to it than simple Ca and Zn ratios. It depends on what form each element is in. What type of ZDDP (there are lots, each with different properties), what type of detergent (ditto), what other chemicals are present and so on. Many of the molecules in an oil are in some way...

TES 668 is backwards compatible with TES 295. So whilst the TES 668 version can be used in TES 295 applications, there are some other approvals on the 295 product that the 668 doesn't carry (MAN, MB, Voith, Volvo, ZF).

It is only "utterly ridiculous" if you have grown up with 3,000 or 5,000 oil change intervals enabled by cheap in-and-out lube stations. 2yr/20k miles has been common in Europe across a few OEMs for YEARS and oils have been developed to meet these requirements for as long as they have existed...

So much to unpack: In the context of the article, which seems to be discussing light vehicles (ie cars and light duty trucks/vans), any ACEA-rated oil will have cover for gasoline and diesel built in. There are some dual-rated API oils too, although not so much with the newer specs. I'm also...

C3H8 + 5O2 --> 3CO2 + 4H2O. So burning 1 mol of propane yields 4 mols of water (plus 3 mols of carbon dioxide). Burn 44g of propane and get 72g of water; so you get around 1.6x as much water compared to the propane burnt. That assumes complete combustion under ideal conditions. So yes, a lot...

There is 'short tripped' and there is short tripped. This is the latter. One quarter of a mile per journey with cool-down in between is not just 'short tripping' it is very severe service. The engine will spend ALL of it's time in cold fuelling mode, meaning a lot of fuel dilution. The water...

I disagree. It doesn't take much water to make an oil look milky. The short trip describe in the OP is extreme, the very worst operating conditions for the engine and perfect for accumulation of combustion water and condensation.

All the MORE reason to be walking. Seriously, it's 500 yards, even at a slow pace that's a 7-8 minute walk (or a 2-3 minute bicycle ride) but will have untold benefits on physical and mental health and fitness, not to mention the saving on fuel and maintenance (and medical bills!). Do it...

This kinda correlates with the Mazda Renesis (rotary) engine deposit formation claims that led to Mazda issuing a bulletin not to run synthetic oil in the Renesis engine. This further led to a lot of misunderstanding and confusion because in Japan only Group IV is considered "synthetic" (rather...

[deleted - made the wrong analysis]