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A new line of bio based engine and gear oils have appeared on Ravenol's site. Here's a broad description of these engine oils, as they seem common across them: "[This oil] is a modern, full synthetic fuel-efficent multigrade engine oil based on renewable vegetable raw materials. [This oil] is...

In the car communities I frequent, many people are on the hunt for the elusive 'unicorn oil'—an oil that doesn't get consumed over the oil change interval (OCI). I've noticed that different brands of oil, even when they share the same viscosity grade, show varying levels of consumption over the...

I was having a discussion about passing this year's emission testing and the topic of catalyts being damaged by oil burners came up. It was mentioned that as long as a car is Euro 3, oil burning shouldn't matter in passing the test and that using ACEA A/B oils would be fine. Personally, I don't...

Generally speaking, how long can the OCI of a Mid or Low SAPS oil be considering the reduced additive pack compared to a Full SAPS A/B oil? For example, given an OCI of around 6000 miles with mixed driving, no more than 1 year, does the SAPS level actually matter? This is considering that the...

Since most discussions about using two-stroke oil as a diesel fuel additive seem positive or neutral, I decided to give it a try. However I can't decide which oil approval would be the best choice or if it matters at all. On BITOG, many people recommend TC-W3 oils, while European forums suggest...

I'm a bit puzzled about this oil's existence and I couldn't find any information about it on here. It's now being sold in my country as "The same great Castrol quality, now in smart bottles". What's so smart about the bottle exactly? On Castrol's site, they say this oil spec is for hybrid...

The car in question is a European Accord with the N22A1 engine, which is a chain-driven DOHC diesel engine with hydraulic tappets. And the scary word there is "chain-driven", as this is a known weak spot with this engine. Honda says 0W30 oil is "preferred", then 0W40, and then 5W30 & 5W40 oils...