Well not sure if any base oils used in XL specifically come from Exxon. I think not. Hence my statement.
Amsoil severe service Engine opened with 82000 miles, 10k oil changes...CLEAN!!!
- Thread starter Navi
- Start date
Supertech 20K is good oil
I don't agree with 20,000 mile intervals even if the oil can handle it, but no doubt in the right driving conditions depending on the engine Mobil 1 EP and Supertech 20K will handle it.
Keep in mind Mobil doesn't claim 20K for all situations this is directly from them
"
Mobil 1 Extended Performance High Mileage motor oils provide guaranteed protection of critical engine parts for up to 20,000 miles or one year, whichever comes first. Excluded service includes: commercial and racing applications; frequent towing or hauling; extremely dusty or dirty conditions; or excessive idling.
If your vehicle is covered by a warranty, follow the vehicle's oil life sensor or the oil change interval recommended in your owner's manual. Proper maintenance practices, including frequently checking the oil level to ensure that the appropriate amount of oil is present, are required to ensure effective performance."
I am firm on 5K intervals personally.
I don't doubt Amsoil's ability to make it to 20,000 miles, nor do I doubt it's cleaning ability. My point is other oils can do it too.
In fact I might eventually run Amsoil, I am strongly considering trying the Amsoil 5w30 100% Synthetic High Mileage because my understanding is that it is a licensed oil which I prefer and I also only run high mileage oils because that is also my preference.
I think my good old 4.3 LU3 would run it very well but it is a 4.3 so it would probably run on cooking oil and not care. (Not testing the cooking oil theory).
Stick to 5K intervals or below and it shouldn't be much of a worry with any full synthetic oil, but if you are worried Valvoline Restore & Protect is the only licensed oil that is available pretty much at any store that sells oil that is proven to clean piston ring deposits.
Piston deposit problems aren’t prevented by oci length. It’s directly tied to oil quality and engine/conditions. I second R&P available at Walmart. Amsoil SS and HPL also keep pistons clean.
XL and OE were my choices on my high mileage commuter. I changed at 10k intervals and did a lot of highway mileage in a K24 powered CRV. Always felt that Amsoil OE gave me the best value. And a clean engine. I pulled the valve cover off twice to replace gaskets and check valve clearances (perfect each time) and it was spotless. Gave that car to my niece at 303K miles. Ran great.
I like Amsoil products and I like the online experience. But more importantly to me, I like ordering the product I need vs looking on the shelf or going to different retailers to get different things. IE - I go through a lot of Amsoil's All-In-One diesel fuel treatment. Not sure where I can find a reasonable equivalent as Walmart only sells Power Service and Howes I believe. I can order oil, grease, fuel treatments, etc. in one shot. Its just convenient, and being a dealer or PC, the costs are similar to name brand products everywhere.
I like Amsoil products and I like the online experience. But more importantly to me, I like ordering the product I need vs looking on the shelf or going to different retailers to get different things. IE - I go through a lot of Amsoil's All-In-One diesel fuel treatment. Not sure where I can find a reasonable equivalent as Walmart only sells Power Service and Howes I believe. I can order oil, grease, fuel treatments, etc. in one shot. Its just convenient, and being a dealer or PC, the costs are similar to name brand products everywhere.
I've been using Valvoline Restore and Protect.
Depends on the engine design and driving conditions as well. In any case, I won't be going to 10k oil changes in my 2019 Hyundai Tucson with a 2.4L Theta II.
Mobil did once produce "Annual Protection" oil. I never got into it, dont know what happened to it. I just found it ridiculous to put oil in the car and change it once per year.
SuperTech at 20k? Once a year Mobil? Thank you but no. I had a good laugh.
SuperTech at 20k? Once a year Mobil? Thank you but no. I had a good laugh.
Even Mobil's regular full synthetic oil are advertised for 1 year now.
They claim the Extended Protection is 1 year or 20,000 miles whichever comes first.
1 year oil change intervals is pretty much the standard now even though I personally stick to 6 months. Also keep in mind whether we like it or not, accept it or not the facts are Mobil 1 and other oils have been doing 1 year intervals just fine proven by analysis.
Patman
Staff member
It’s not really that ridiculous. I do one year oil changes on my Corvette, as do many late model Corvette owners. I even used to do two year oil changes on my previous Corvette
What exactly is funny about annual oil changes? I've been more or less doing that for years on my Mustang, and never an issue. I've used NAPA Syn, Castrol Magnatec, QS, Pennzoil and Mobil 1 like that. Couple UOAs back with plenty of TBN, too.
It is easy to keep engine internals clean today. Nearly all of the 0W-xx syn oils and really, all quality synthetics can do it . Good luck keeping that timing chain and variable cam systems healthy with thousands of miles of circulating particulates, contaminates and combustion by products due to extended oil change intervals though.
The number of engine repairs today due to extended oil change intervals is simply stunning. Many direct injection engines create well contaminated oil by 4000-5000 miles. Put another way, driving another 5000 miles is simply circulating an ever increasing particulate load and non-oil contaminates.
As always, I suggest choosing a quality synthetic oil with adequate viscosity for the task at hand coupled with frequent oil changes. I have zero interest in spending $4000 changing my timing chains.
My Chevy LS3 is still together @ 110,000 miles on Mobile 1 so….YAY!
Does Mobile 1 include unlimited data?
As my mentor taught me when I was just a kid,,, watching. He was doing an oil and filter change on his 1978 Oldsmobile 98. The car was black. Beautiful car. He said to me " kid, motor oil is motor oil. What matters is how often you change it " That was back in the dino oil days. Now, I wouldn't dream of putting dino oil in any of my cars. But, I still live by his rules. He never really taught me much,,,I just watched him,,,and learned..... I do 3 month/ 3k oil and filters on all my cars, just as he told me. They all run fine, and all have over 125k on them. I just put whatever synthetic oil is on sale in them. Do I think Amsoil is a good product ? Yes. Would I pay the price for it ? No . More suited for fleet vehicles in my eyes.
4WD
$50 site donor 2025
I bought a ton of M1 AP on clearance - it was 60-70% PAO - but, never ran it past the OLM range.
Once out of warranty - ran EC30 and later VRP cutting filters early on that 2017 5.3L Not a speck of carbon …
IMO, the current EP is not in the same league as the AP was - but the initial price was too high for AP to survive …
I change EP/ESP at or below OLM % of use …
4WD
$50 site donor 2025
Only for the cell towers in coastal Alabama
237,000 miles on my 2.5L Jaguar X-Type. The engine is every bit as clean inside, and shows no signs of timing chain slack, engine noise or known rod bearing problems. M1 10W-30, 5W-40TDT and now 10W-40HM since new. 5K OCI's.
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