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I’m about 1500 miles into my first Amsoil AZF 0w-40 run on my Ram 6.4. I use Amsoil products regularly in my other vehicles. Here’s my observation: It’s noisy: Very audible valve train on startup. I get very audible lifter tick for a few seconds until they pressurize. It’s happening about...

2017 Silverado 5.3 towing 7.5k on a routine basis now. Coolant temps hold at 207, then up to 215-220 until the fans pull it back to 207. I notice when I stop, the oil psi drops to My question is keep running 0w-20 Dexos (Currently on M1EP) and stay with a higher PAO/Ester oil, or step up a...

Searching the threads I see lots of negativity towards M1 gear oils (not Delvac). Anybody care to shed some light? Getting ready to change my Silverado again w/ G80 locker and already purchased M1 75w90 for the job.

GM 5.3 AFM just started consuming oil ~30k miles. Need to run a few short OCIs with a high detergent oil to clean ring packs and also disabling AFM as we speak. What's the consensus on the most aggressive cleaning oil available? Amsoil SS, PUP, M1EP/AP? Has to be available in 0w-20 flavor. Thanks.

Changing my diffs running 75W90 in the front and 75W140 in the rear. Need 2.1 quarts for the rear but don't want to buy a 3rd quart. Ok to mix a few oz of 75W90 with 75W140 in the rear?

I think I know the answer but started second guessing myself. One vehicle calls for 6q of 5W-20 (typically use M1 or VSP) and the other for 8q of 0W-20. I generally buy 2 jugs of 0W-20 for the one jug of 5W-20 for the other and use the left over 0W-20 to supplement the 5W-20. Ok to blend with...

Wife now has a daily commute of less than 2 miles. Weather here is 10F in the winter and 100F in the summer. Vehicle is a 2014 Silverado 5.3 direct injected. Typically the OLM aimed for roughly 7500 mile OCIs when we drove it normally. Given her commute now, the coolant never even comes up to...

Looking for fluids for my front differential. Jeep Wrangler JKU Dana 30 front high-pinion, non-locker. Rear Dana 44 that I'm using SVG 75w-110in. I'm timid about changing the front away from a mineral based lube simply because it's a high pinion and I'm not convinced synthetics do all that well...

Reading through the September newsletter from Amsoil which contains a section discussing NOACK volatility. One of the paragraphs mentions the more stringent DEXOS 1 NOACK limits of less than 12% weight loss? We commonly discuss this around here and the typically claimed (myself included) number...

Fram's catalog is giving me multiple results. When I input my vehicle (2014 Silverado 5.3) the application lists XG10060. However if I cross reference the AC Delco PF63 for my vehicle, the Fram catalog lists the XG10575. Both the 10060 and the 10575 both list my vehicle as an approved...

2014 Silverado needs a PF63 or equivalent. I've used Delcos forever on our last 3 trucks. Love them, great for the OLM intervals. However they've more or less converted their entire line to E-cores. Very few Delco "classics" left. I also like them for warranty hassles. Can't find a non-ecore...

97 Civic 162K, now no longer my daily driver. Get used 2-4 times per week, but does see highway speeds for 12 miles so the oil does reach proper temps. Averaging about 6-7K annually. I'm only wanting to crawl under it once a year, so can a syn blend (most likely Maxlife) make it a full year or...

I recently switched to HM oils in my 97 Civic. One change of Castol GTX HM and now on to Mobil 1 HM. Finishing up the M1 oci shortly. In all about ~ 10k on HM oils, 155k total on the car. Car is in great mechanical condition with no leaks or consumption. I started using HMs simply to help the...

Wife's 2014 Silverado just rolled 5k miles. I usually do a flush of the front and rear diffs and transfer case at this mileage for peace of mind. Apparently GM in a quest for CAFE standards is now using a proprietary 75w-85 GL-5 synthetic rear end fluid as opposed to the old standard 75w-90...

Moving my 97 Civic over to synthetic. Had a stead diet of dino every 4-5k for the first 148k of its life. Haven't owned it long enough to know if it burns oil. Do I just take the plunge? Start with a HM syn? If I start with a HM am I stuck using it for the future. I grabbed a jug of M1 HM 5W-30...

Sold off our 2013 CRV and snagged a 97 Civic 1.6 SOHC VTEC with 148K on the clock. Previous owner had all the maintenance done on time at the dealer so it's in spectacular mechanical shape. I know the 1.6 VTEC's are prone to consumption/burning as the miles increase so I'm lost as to what oil I...

About 1600 miles into my cleaning phase. My history is a 2009 5.3 AFM that began consuming oil around 25-30k miles. Currently 57k. Consumption got bad enough for the dealer to finally do the TSB fix for a revised PCV valve/cover and AFM shield in the oil pan. They also did a piston soak but said...

Finally got fed up with our Silverado and traded it on a 2014 Pilot instead. Engine is the J35Z4 3.5L VCM. For those of you who are familiar with all the early VCM problems, what OCI do you recommend for this application? I will be using synthetic 0W-20 and Honda filters during the warranty...

Have a 2009 Silverado with the 5.3 with AFM. Has become a major oil consumer over the last 20k. It has finally become bad enough that the dealer is going to fix it. Currently consuming 1 quart every 1000~1250 miles. They are going to install an AFM oil valve deflector in the oil pan and a...