Recent content by weasley

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]

You're comparing two different products - Mobil Delvac 1 Gear Oil 75W-90 and Mobil Delvac 1 Gear Oil LS 75W-90.

It's difficult to compare them as they are tested using different in-house methods; different engines, different conditions and different test limits.

Another issue could be the masking of wear of yellow metal components in UOA. There would also be a potential conflict with the electronics industry regarding cost and availability of the copper. There may also be differences in toxicity and other such factors between copper and zinc...

Mostly in San Francisco or Los Angeles by the looks of it. https://afdc.energy.gov/fuels/hydrogen_locations.html#/find/nearest?fuel=HY

Here's what Mercedes have to say about it... The principal recommendation is for MB 229.5.

Castrol Transmax Manual V 75W-80 works, if you can find it. https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/0924D55E21283EC780258A750034832F/$File/wepp-cy25zt.pdf

This summer my son was gifted a young driver experience - this is an opportunity for youths to have a go at driving a car in a controlled environment (in this case an airfield). He is 13 years old and was booked to drive a compact automatic hatchback (a Vauxhall/Opel Astra). However on the day...