Recent content by Petr

Just two examples: MB229.71: Mobil 1 ESP X2 0W-20 - euro oil that meets "API SP engine tests" not the API SP RC as such (possibly due to elevated phosphorus content). MB229.72: RAVENOL Eco Synthetic EFS SAE 0W-20 - formally meets API SP (RC).

This is especially valid for base oil properties. The anti-wear additives and partially also the friction modifiers prevent the increased wear regardless of the low HTHS, therefore crazy-low HTHS oil is capable of surprisingly low wear that matches oils with higher HTHS. On the other hand, as...

In the past Renault advertised OCIs upto 50 000 km, therefore the RN oils had to have excellent oxidation stability - quite often truly synthetic (PAO) based oils that also carried some other rather demanding euro-approvals. In the user manual, you should be able to find instructions on the...

The oil you have is an excellent one. Technically, there is only a single reason not to use it - in case of very high oil consumption, the GPF may fail a bit earlier than it would with a C3 /RN17 oil as the RSP has a higher content of sulphated ash. As long as the oil consumption is low the...

Thank you for the warning. What exactly was wrong with the used oil analysis? I have seen just a few (three or four) of the DXG UOA results on the German oil-club.de and I did not see anything wrong. Just nice low iron wear numbers and sometimes slightly elevated copper numbers. I would believe...

My experience is that oil burning is not caused by high revs as such, but by a lot of time of engine braking from the high revs, when you create vacuum in the cylinders. Ravenol RSP might be optimized for tracking and longer rides therefore if you have lots of short trips then VMP or DXG might...

In the 235/55/19 the "55" indicates the potential "floatiness" (relative sidewall height). Assuming you have correct tire pressures, the "55" is an excellent compromise between comfort and handling therefore your problem is unlikely to be caused/solved by tires. A minor improvement can...

https://claytonnotes.com/carbon-pile-load-tester-vs-digital/?expand_article=1

CapriRacer is right. I have replaced an SL tire with an XL tire, and the XL tire was much more comfortable than the SL tire. Same size, both summer UHP category, same tire pressures, and different make.

The major problem is that R&D related to combustion engine technologies is being canceled, therefore engineers and developers are moving into other industries. In the long term, the know-how that existed in Europe will be lost and the competitiveness of European industry related to the...

No mass-produced passenger car manufacturer is using special brake-in oil. If they do, they do it as part of the manufacturing process before the engine is mounted into the car and filled with the oil that the customer gets - i.e. some special oil might be used when the engine is first rotated...

For example have a look at this figure: https://www.researchgate.net/figure/Dependence-of-internal-resistance-versus-temperature-for-lithium-based-batteries-LiFePO_fig15_316171277 While the temperature dependence of internal resistance is not linear in general, in the range between approx 0C to...

It starts to be significant if you perform the test at battery temperatures below approximately 10C (50 F). At lower battery temperatures you will get lower CCA numbers from the tester. At 0F you may see the internal resistance almost double the value you would get at 80F.

Did you read the manual? The internal resistance is highly temperature-dependent. More smart battery testers might have some tricks how to estimate the resistance better regardless of the battery temperature (e.g. use a ratio of high frequency currents vs. DC current, etc.). If the temperature...

Fuchs Titan GT1 product line is more recent than Supersyn, yet both are very good oils. Supersyn long life has MB229.5 and Porsche A40 approvals - few years ago it was one of the top oils on the market qualitatively competing with Mobil 1, Shell Helix Ultra and Castrol Edge. Then Fuchs came...