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Getting ready for the 4th July HPL sale… Currently running Amsoil 0w-30 sig.series in the 1GR-FE in the T4R. Looking to make the move to HPL and favoring the NoVII 5w-30 from the specs. especially the HTHS of 3.399. 2nd choice would be maybe the PPPCMO in 5w-30. I am not seeking a Euro oil...

With the move of L87 engines moving from a 0w-20 to a 0w-40, I am now confident that the LT engines will live a longer life with a oil with a higher HTHS. 0w-40 seems like quite the move going 2 levels up. Might even hit fuel mileage a little. Also significant VII that are prone to shear and...

Here is the UOA from my 2018 Toyota 4Runner with 1941 mile on the oil with a 29 month run. Vehicle has 5600 miles on the clock, this is rarely driven, but brought up to operating temp when used. Vehicle is stored outside, sometimes covered, sometimes in a car port. Was changed due to time, not...

Have the timing cover oil leaks for Lexus 2GR-FE been resolved for the new builds? Specifically a 2025 ES350. Or is this a ongoing issue that affects all?

What engine oils are using mPAO in their formulations? mPAO is supposed to be superior to conventional PAO, but significantly more expensive. Superior in regard to film strength and viscosity index. I am aware of Driven and HPL No VII using mPAO. I believe Mobil 1 does in some of their upper...

Looking at possibly buying a new 2023 Silverado WT 4x4 with the 8L90 and 2.7 Turbo Max, Crew Cab Standard box. Discounts are getting pretty good as inventory of trucks are piling up. Have the 8L90 transmission issues been sorted for the 2023 model year or are these transmissions still...

Does a 2023 Silverado WT 4x4 2.7 turbo, without a locking rear differential use traction control to apply the brakes to the spinning wheel to act as a limited slip? I am looking at possibly buying the above vehicle and am used to limited slip in my other vehicles, will the newer tech of...

Probably a stupid question… but why does HPL no VII 10w-30 exist when the 5w-30 no VII already doesn’t have Viscosity Index Improvers? also the case with the 5w-20 and the 10w-20?

Should I use HPL differential life 75w-90 w/limited slip additive for all my diffs or should I call them and order some without the limited slip additive for the ones that are not limited slip? referring to cars in my sig.

Did my first oil change on my new to me 2020 Mazda CX5 Grand Touring. 2.5 non-turbo. Manual and websites say 4.8 qts. Why did it take 5.5 qts. to bring the oil to the full mark on the dipstick? I used ramps, so the front up on an incline. While the oil and filter was draining I jacked up the...

Do the higher percentage of esters and PAO's found in higher end oils shorten the life of internal plastic engine components, such as timing chain guides, plastic valve covers, oil pans, seals gaskets etc.? I remember having a plastic funnel I used for drain oil that got brittle and cracked...

Thinking about using Ravenol products in my `18 4Runner TRD Off Road. Ravenol WS in the trans. Ravenol 75w in the transfer case Ravenol 75w-85 in the front and rear diffs maybe even get the Ravenol DXG 5w-30 for the engine? kinda of expensive stuff, but cheaper than the crazy Toyota 75w in the...

2020 Mazda CX-5, 2.5 Skyactive G (non turbo). Looking at using the oversize 7317 filter in place of 6607, any clearance issues? or functional issues? I see many run the Mazda filter and won't stray from OEM. Would like to do this due to already having the longer filter on hand for my Honda's...

I am an Amsoil Signature Series user in the vehicles I care most about. However, the engines of some exhibit piston slap until fully warmed up, especially during the colder climate. Reading through the reviews (mostly on Amazon) for Schaeffer's oil, almost all reviews rave about the engine being...

With all the good talk about HPL, I am looking at using their 75w-90 gear lube in the differentials of my `18 4Runner, `16 Suburban and `97 Dodge Ram. All 4WD, so 6 axles in total. Anyone have any experience with the gear oil they would like to share that makes it above and beyond the Amsoil...

Wondering what shifting characteristic differences there would be running Amsoil Sig. Series Fuel Efficient vs. GM approved/Licensed Dexron VI? Seems like GM tech's and engineers are really against running a multi-vehicle, non-licensed fluid. Application 6L80 for: - `16 Suburban - `12 Corvette...

On my `16 Chevy Suburban with the 6 speed and 5.3 L, I just did the change to the lower temp. thermostat as per TSB 21-NA-199 which lowers the temp 26 degrees F or 20 C. New full open temp. is 158F or 70C. https://static.nhtsa.gov/odi/tsbs/2021/MC-10207911-9999.pdf I wasn't having any issues...

Received from Rock Auto today: GATES K070701 made in China This was sent as a warranty replacement, because the one I received (from RA) and installed about 4 months ago developed a crack width wise on the backside of the belt. I wonder if the one from 4 months ago is from China also. I guess...

Looking for oil preference for this 12.5 Kohler Command from 1993 in a John Deere 38" garden tractor. I know that the manual calls for 10w-30 2 qts. for the temperatures of which I will be operating and a spin on filter. I have various 10w-30's. Does this engine care? Is it okay running Amsoil...

Is there a tool to quickly clean up corrosion on a aluminum wheel at the valve stem hole? This is my winter set of wheels for an `06 Honda Odyssey EXL. This is to fix a slow/med leak, I am not really concerned about how it looks. The salt/brine has done a number on these wheels and I just want...