Too bad VW wasn't as proactive on their water pumps and thermostat housings.
Anyone see API SQ?
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edyvw
$50 site donor 2026
I am not sure that is a debate, but I can name several manufacturers who still cannot figure out brakes, steering racks, and of course, LSPI 20 years after it has been known about it.
wemay
Site Donor 2023
The Havoline in the nearest Walmart is SQ.
edyvw
$50 site donor 2026
Many blenders had SQ test done even under SP label.
Pennzoil was running Euro 5W40 under API SN+ and then just changed the label to API SP without changing chemistry.
I would bet most oils that are API SP now, are already exceeding SPI SQ requirements, have been tested, and companies will switch to SQ labels once they run out of SP.
LSPI results from the auto makers programing the transmission to shift into the highest gear at low engine rpms thereby lugging the engine. How does oil solve that??
Here’s Amsoil Extended Life XL 5w30 ordered a couple months ago.
OVERKILL
$100 Site Donor 2021
By using additives that either suppress (ZDDP) LSPI, or reducing additives that promote it (Calcium).
OVERKILL
$100 Site Donor 2021
Yeah, this was not a major change that required reformulation, like SN+ was, where detergent packages fundamentally changed. It's likely any oil that wasn't blended to be on the razor's edge of passing SP would pass SQ without issue.
wemay
Site Donor 2023
Yes, i agree. Probably all the majors have long since updated their chemistry, but as far as printed on the labels, Havoline is the first one i've seen.
Watch the movie Pulp Fiction, there is a suitcase in the movie that went opened something inside starts glowing gold. It is a bottle of Castrol EDGE Extended Performance with API SQ certification.
wemay
Site Donor 2023
API SQ has yet to be included in the Lubrizol spider chart, but ILSAC typically goes hand-in-hand with API. Here's GF-6 compared to GF-7...
OVERKILL
$100 Site Donor 2021
I broke down the differences on the previous page.
This is easier to understand. Thanks for posting.
My personal guess is SQ is simply a fine tuning of the SP formula. Everyone is welcome to submit their SQ formulations for testing and post it here. However I think the formula changed a while ago in anticipation or the current formula might already meet the spec. My expectation is for a used oil analysis to not have much of a difference but we shall see and please post your used oil analysis.
If I was in the oil business I would have changed the formula the moment it became known and worked directly with API behind the scenes.
If I was in the oil business I would have changed the formula the moment it became known and worked directly with API behind the scenes.
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I only run premium fuel in my 3.5 Ecoboost and have not had any pre-ignition events that I'm aware of, but I did just have my timing chain replaced due to excess wear. I started having issues around 130,000 and finally got it replaced at 173,000. The failure was progressive. It started by throwing a timing code only while towing, then near the end it would happen whenever the engine ran for a few hours.
I'm curious about the benefit of SQ for timing chain wear. My understanding is that most engine wear takes place during initial dry startup. By that logic, potential oil contamination is a secondary factor. So how does this certification reduce excess timing wear?
I'm curious about the benefit of SQ for timing chain wear. My understanding is that most engine wear takes place during initial dry startup. By that logic, potential oil contamination is a secondary factor. So how does this certification reduce excess timing wear?
"You can expect to start seeing the new Mobil ILSAC GF-7 engine oils on store shelves from late 2025 into 2026." - Mobil
https://www.mobil.com/en/lubricants/for-personal-vehicles/auto-care/all-about-oil/ilsac-gf-standards
https://www.mobil.com/en/lubricants/for-personal-vehicles/auto-care/all-about-oil/ilsac-gf-standards
I had an LSPI event within the 1st week of owning my new car. A 1.6T AWD Hyundai Kona and 17 PSI at 1,400+ rpm is the OEM tune. Felt like the jumped jumped 5 ft in the air and 3 second later my self talked "there goes a brand new motor" but after another 3 seconds of the shock starring at the tac, the car was idling normally. 72,000 miles later and stage 2 tuned, it still is running. Needles to say I now roll it on as habit at very low rpm. And it was very loud when it happened.This is not directed at you, but in general. How can API SQ improve on SP’s LSPI protection in the real world? Even on this massive board, with people laser-focused on everything oil-related, and also willing to blame the oil in many instances where it was not even a factor, I don’t think I’ve seen one single person who knows of an LSPI event that has destroyed an engine. Not even their neighbor’s cousin’s auntie’s grandson’s baby mama…
About the only way it’s possible to induce the conditions is to have a small turbo engine that’s ingesting quantities of oil vapor into the combustion chamber, lock the trans in manual mode (if it even has one), put it in waaay too high of a gear (sub-2k RPM), and then tow something up thru the Eisenhower Tunnel with the pedal on the floor. I’d love to see manufacturer-accepted or even SAE data that shows the failure rates due to LSPI vs the total population of engines they say are vulnerable to it. I bet there’s not only quite a few zeros between the decimal and first number, but also that the majority of those engines were likely neglected as well prior to their demise.
BTW, H/K engine bombs and YT videos don’t count since they’re not verifiable
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