Do Oil Additives Work?

[oldgeek]

I asked Gemini to summarize this video as it is long and I didn't want to sit through it.

This is the summarization with time stamps:

The Core Conclusion​

Based on statistical analysis of over 8,000 gasoline and 2,900 diesel engine samples, adding aftermarket oil additives makes no statistically significant difference in engine wear. The experts emphasize that modern engine oils are already highly optimized through millions of dollars in research and development [12:40].

Key Insights from the Data​

• Contamination is the Real Enemy: Factors like fuel dilution, silicon (dirt), and internal particles have a far greater impact on engine wear than the brand of oil or any additive used [46:02].
• The "Break-In" Curve: Engines naturally experience high wear during their first few thousand miles. Data shows this wear levels off significantly as the engine ages, regardless of additives [35:18].
• Psychology vs. Data: High-end vehicle owners (like Porsche or BMW drivers) are statistically more likely to use expensive oils and then add expensive additives, despite the data showing no added benefit [29:52].
• Diesel Specifics:
  
  • Bypass Filters: Unlike chemical additives, physical bypass oil filters in diesel engines did show a measurable reduction in wear by better managing soot and fine particles [01:16:45].
  • Fuel Lubricity: While oil additives didn't help, the experts noted that fuel additives can be beneficial for protecting specific components like the Bosch CP4 fuel pump from low-lubricity ultra-low sulfur diesel (ULSD) [58:11].

Why Additives Can Be Risky​

• Chemical Imbalance: Adding a "chemical grenade" can throw off the carefully balanced formulation of licensed oils [02:08].
• Seal Compatibility: Many additives are not tested for compatibility with modern engine seals and wet belts, which can lead to premature failure [01:21:50].
• Reduced Stability: Certain additives can actually lower the oxidative stability of the oil, leading to faster degradation and deposit formation [01:23:41].

Maintenance Recommendations​

1. Use High-Efficiency Filters: Choose filters with the highest efficiency at the lowest micron rating [04:01].
2. Follow Filter Lifespans: Don't change a high-quality filter early; it actually becomes more efficient as a "dust cake" forms during its rated life [04:40].
3. Prioritize Cleanliness: Focus on high-quality air filtration and managing fuel dilution rather than buying "mechanic in a can" supplements [01:13:40].

 

[pentode]

I've watched quite a few of his videos and I think there are a couple general takeaways from all of them.

1) Modern engine oils (API SP and SQ) are great

2) Follow manufacturers recommendations and you'll pretty much be fine

It's pretty reassuring actually and really simplifies things.

 

[85_Ranger4x4]

I've watched quite a few of his videos and I think there are a couple general takeaways from all of them.

1) Modern engine oils (API SP and SQ) are great

2) Follow manufacturers recommendations and you'll pretty much be fine

It's pretty reassuring actually and really simplifies things.

ZDDP additives are rather important for young flat tappet camshafts however and are very lacking from most modern oils.

 

[pentode]

ZDDP additives are rather important for young flat tappet camshafts however and are very lacking from most modern oils.

Yeah, he has at least one video specifically on that topic. One thing I learned is that ZDDP and detergents fight each other. I've been a big Rotella fan for my flat tappet cars for decades, but his testing showed than a standard SQ oil was better for wear metals than Rotella in a gas engine.

I tend to give him a high degree of credibility as he has done oil formulation for a couple major oil companies, and yet he seems to stay pretty brand-agnostic.

 

[bobbywalter]

he is coolz.

met him a few times and his packaging of rings for several projects with companies in detroit area is based on oils and formulation combined with ring tension and fuel types.

rotella does work well with many gasoline applications...the diesel oil...not the gasoline oil ...this is assumed why it is mentioned...

and certain additives do work well once an engine is damaged and well worn and on the way out.

based on the last 3 years testing and reporting and current 500k reporting capacity with the ecoboost engines...i am on the restore and protect train.

always a valvoline fan for my gas engines. but i ran supertech in my pushrod engines because of lakes testing specifically....once he tests a walmart version...if ever there is a walmart version...mobile 1 is offering it now...so who knows..but if they do make a version of protect and restores and lake speed clears it, i will probably go to that if cost structure is the same as current...because it is a significant savings.



but i do build engines to run with rotella or 20/50 in regards to ring package and bearing type/tolerences. that is a thing too.

 

[JohnnyO]

Yeah, he has at least one video specifically on that topic. One thing I learned is that ZDDP and detergents fight each other. I've been a big Rotella fan for my flat tappet cars for decades, but his testing showed than a standard SQ oil was better for wear metals than Rotella in a gas engine.

I tried Rotella Synthetic 5w-40 in my daughter's old Jeep Wrangler and it burned that stuff like crazy, like a quart in less than 1000 miles. I went back to Max Life 10w-30 and it was fine, hardly used any oil. It had a 2.5L automatic, no OD and 4.11 gears, so the engine was getting a workout.

based on the last 3 years testing and reporting and current 500k reporting capacity with the ecoboost engines...i am on the restore and protect train.

always a valvoline fan for my gas engines. but i ran supertech in my pushrod engines because of lakes testing specifically....once he tests a walmart version...if ever there is a walmart version...mobile 1 is offering it now...so who knows..but if they do make a version of protect and restores and lake speed clears it, i will probably go to that if cost structure is the same as current...because it is a significant savings.

Used Valvoline Restore & Protect the last few oil changes in the Ecobeast Ranger. Used mostly Valvoline Synthetic before.
I figure it will help with the turbo and turbo oil screens. An FL-400S filter is bigger and fits right on in place of the FL-910S. I use the Mobil 1 equivalent.