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At a loss again. They tested it and said it passed, so back in the truck it went but did some more testing this time. Read the battery again before installing, read 12.7V and 650CCA at 55 degrees F (rated 840 @ 0F). Hooked it up and checked for a parasitic draw, measured 10mA which is nice and...

Don’t have the time or inclination for all that, but did charge it to 100% yesterday then disconnected the negative cable and let it sit for 24 hours. Almost exact temperature today as yesterday. Start of test: 100% charge, 12.4V Almost 24 hours later: 48% charge, 12.0V. Going to see about a...

Took your suggestions. Engine off, no start since yesterday afternoon 12.0V Engine on 14.9V No voltage drop connected or disconnected stayed a steady 12.0V after 10 minutes. Truck performed flawlessly the day prior to the extremely cold temperatures. No lights left on or anything other than...

Talking to you and to some others I know has me leaning towards this. Even if the charging system isn’t delivering an optimal charge (for an AGM) this battery should not have failed in less than 4 months.

Thanks for all the replies. Seems I should have done more research before buying a supposedly “premium” product for a vehicle that can’t really utilize it properly.

Probably not. See the voltmeter all over the place when driving, which is normal for the so called “smart” GM charging system. Had no idea there was such a drastic difference for AGM vs standard flooded lead acid. Figured if it wasn’t plug and play someone would have tried to sell the...

I don’t have a diode installed…maybe an issue worth looking into, thanks. Kinda wish I’d just gone with standard cheap Walmart battery at this point.

The truck has a “smart” charging system that varies the charge depending on several factors. Meter on the dash was pegged at 14+ volts after starting so without having hooked up a tester that seems fine. No lights on and not sure about any parasitic draws, but it was never an issue with the OEM...

Silverado battery was coming up on 7 years old so I swapped it out for an expensive X2 battery this past fall as a preventative measure. This morning it was 8 degrees F when I went to start it and got the dreaded click with no crank. For a battery that was less than 4 months old and rated at...

😂😂😂 awesome. I feel better now…See this site can be therapeutic!

Identify with this so much, lol. My conundrum (first world problems) is to let my let my OCI go to 6200 miles so I can make it a nice even 10k on the odometer, or stick to my plan to not exceed 5k and then fret over it for the next year that my multiple of 5k interval is off. 🤣 Yes, I know I’ve...

Dad was (and still is) a Pennzoil guy. Used PYB straight 30-weight in all our GM vehicles back in the 80s, never had an engine problem in any of them. As for the rest of the vehicle components…well I’m sure a lot of us can remember the garbage quality control of domestic cars back then.

Point taken, but I do 7500 mile runs using M1 AFE or PP in my Coyote engine and the TBN is usually in the low 3 range.

I think this is the second report I’ve seen recently on this Valvoline flavor where the TBN was on the low side during a normal OCI. I know it’s not marketed as an extended drain oil, but I kinda expected it to hold up better than this. That being said your wear numbers look nice, so it did...

Different engine for my Silverado, but tow a 7k lb travel trailer frequently during the summer. I use the recommended 0w-20 year round…my UOA’s showed no difference in wear metals towing or not, FWIW.

Same here! **** those evil capitalists making profits for their shareholders! /sarc FYI…Exxon Mobil lost $22B just 2 years ago, but no one complained then when the oil workers were being laid off left and right due to the oil prices being too low to be profitable.

Of course we all want the latest and greatest thing, but according to one of the comparison charts, D1G3 is actually a step backward performance wise in a couple of ways. Doubtful that one OCI with a product that meets your engine’s current spec will cause any issues.

From the 21 manual it’s maximum of 12 months or 7500 miles.

Thanks! This car is all about the driver feeling everything going on with it, but if there is a difference I haven’t detected it.

Yep, couldn’t care less about the pour point here. Less volatility and less need for VII were the selling points for me with PAO-heavy oils.