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M1 FS 0W-40, M1 ESP 0W-30, M1 5W-30 ESP Volatility Results - May 2025 The test was conducted on May 24, 2025. These oils were sent them to me by two BITOG members. I still have some more oils to test that were sent by one of the members. As always, 1.000 grams of oil were used for each oil...

The test was conducted on March 23, 2025. A generous and curious member sent them to me. Thank you! As always, 1.000 grams of oil were used for each oil. They are put in aluminum cups with a cutout on part of their sides that allow venting to occur despite me covering the cups with folded...

This is on the 2.3l engine. The plastic part is fiber-reinforced, so it is very rigid. I’ve been unable to remove the old one so far and am looking for tips on a good way to do it. Attached is a picture of the new part. The valve cover has protrusions that pop into the two slots. My best...

Here, Shear Stability, is a useful thread from 2004, that I think may be good to share with newer members. The calculation, KV100/HTHS, that TooSlick proposed for the inverse of the temporary shear stability has the benefit of being the most simple. I prefer HTHS/KV100, which is a measure of...

A while back I did volatility tests of Amsoil SS 10W-30 and Quaker State Ultimate Durability 10W-30. The oils ended up forming soft insoluble particles, as oils do when subjected to such temperatures for long enough. Today I decided to determine if VRP would resolubize the insolubles. I first...

Initial oil weight: 1.000 grams. Oils were heated in toaster oven placed outside. Oils were in aluminum cups with a cutout about halfway up, so venting occurs. See pictures that I will include later. Oils were covered in single, multi-layer aluminum foil to block radiation from coils. Cups were...

The test was conducted on Dec 30, 2024. Temperature was set on the oven to what looked like ~ 420 F. A thermocouple reading on an oil with that same oven setting on Dec 27 said 431 F, when was ambient temperature was 47 F. Ambient temp. at start of this test was 60 F. Quaker State 5W-40 was...

I was scrolling through some of my photos and thought I’d share what motor oil ash looks like. See the cup on the right. These oils unintentionally autoignited in a test. It was VRP’s fault and it caught the other two oils on fire. VRP burnt very far to completion, allowing it to form a lot...

The oil was tested alongside Quaker State 5W-40 API SP, which is believed to have a Noack volatility of 5.7%. The temperature was set to what appears to be ~420 F on the oven's dial. A thermocouple reading on a separate oil at that setting was 431 F. PP Euro L 5W-30's volatility impressed me...

This test was conducted at ~380 F. Previous volatility threads describe the general test procedure. I will reiterate that the relative positions of the oils were rotated between weighings. Aluminum foil covered the tops of the cups to shield the oven from radiation. The cups are open on part...

Castrol 5W-40 (C 5W-40), Quaker State 5W-40 API SP (QS 5W-40), Quaker State Ultimate Durability 10W-30 (QS UD 10W-30), Amsoil SS 10W-30 (Ams SS 10W-30). Please see the following two threads about past results...

Please see this earlier thread for a more complete description of the test procedure: https://bobistheoilguy.com/forums/threads/quaker-state-ultimate-durability-and-ultimate-protection-volatility-results-nov-2024.389905/ In this paragraph, I will only point out things that differed. Oil...

Oils tested: 10W-30 Ultimate Durability (UD), 0W-20 Ultimate Protection (UP), 5W-20 UP, 5W-40 UP These oils were purchased in the United States. 10W-30 UD was bought several years ago. The UP oils were bought a few weeks ago. 1.000 grams of each oil was placed in separate, small aluminum...

This is a weird question with a specific purpose in asking. Do these oils have a normal motor oil smell or do either smell a bit like stinky gear oil?

Here's a nice set of slides by Ian Taylor. I think the most interesting ones are about the impact of Lubricants on Oil Film Thickness. Note the film thickness being a function of the square root of the oil viscosity. Doubling film thickness requires quadrupling the viscosity in such cases. LINK...

Lubricant Formulations to Enhance Engine Efficiency in Modern Internal Combustion Engines https://www.osti.gov/servlets/purl/1351980 This was a three year long effort and they did some great work. Some things I thought were particularly neat were: - Separate oil for the valvetrain from the oil...

The main points should be familiar to those of us who read oil papers, but I’m posting it because it’s a good paper. It’s from 2016. The statements below are not all in the paper. Some come from other sources. Thinner oils push the lubricant regimes to the left on the Stribeck curve. Yep, it’s...

I tested the ability of these two engine flushes to dissolve very baked on motor oil varnish. The BG EPR was purchased this month and the Amsoil Engine Flush is around 10 years old. First, I needed two blobs of varnish so I created them. I put two drops of same size made of Mobil 1 20W-50...

“WHY SOME PASSENGER CAR MOTOR OILS ARE NO LONGER SUITABLE FOR MOTORCYCLES: GEAR PITTING ISSUES” Starts on page 12. https://hrcak.srce.hr/file/9883 “SUMMARY While there is a constant push to develop more fuel efficient oils for passenger car applications, these same oils become less suitable...

http://oil-additives.evonik.com/sites/lists/RE/DocumentsOA/stle-2016-deposits.pdf They showed interesting results. I wish the slides had more and better text. I’ll will do my best to summarize them. TEOST 33C Deposits when base oils (apparently without additives) ranged from Groups I to III+...