OEM Off-Road Light Switch Install
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I did shorter OCI"s for many years without an issue, fights sludge and wear IMO. Recently started using Amsoil, will not do the recommended/advertised miles between changes. -
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It definitely seems quite evident that emissions and fuel economy targets rule above the best case scenario of what the engines best health and life could be otherwise. Items like DI and turbo DI engines with their LSPI issues as well as cats being reduced in life if the proper levels of certain additives were allowed to be utilized and so something has to be compromised and as you point out that is the engine protection from sludge, acid and wear which isn't in the manufactures best interest regardless to worry about in this race to profits from higher sales and so if the engines wear out sooner the next sale is closer at hand. I am hearing that its likely the two new 2027 GM half ton truck engines will call for a 0W-30 oil, now if that is an existing oil I would have to think so but we will see in the coming months. Sadly as you've pointed out to me, over the last number of years the push has been on to reduce the actual operating temperature viscosity within each designated viscosity grade so that 11.5 to 12 range for a 30 weight for example is more in that just above 10 range at 100c along with that temporary viscosity sheer dropping it even further down as per that "energy conserving" designation, not to mention how some oils are not as sheer stable as would be ideal and that mixed with a long OCI paints a picture with a little too much glitter shall we say !. All that and the warranty gods scaring the vehicle owner into sticking with that watery wine or risk loosing their warranty coverage if they go and use an oil that is of a higher viscosity even if it meets the emissions and LSPI requirements and would never damage the engine but may very well allow for an engines longer life depending on engine use scenarios ... high ambient temps, towing etc that push oils to their limits. -
Very true. However. GM did give those trucks with the single speed case Terrain Mode. Terrain Mode mimics 4LO minus the gear reduction and torque capability. It uses the ABS/braking system to perform the operation. It also gives these one pedal driving (sort of) when in Terrain Mode via the active brake during throttle lift. Does it have its limitations over a true 2 speed case? Sure. But it works. -
Of course actually engaging four wheel drive is step one or even daring to use a ramp like that with a two wheel drive and getting into a mess because of it. As to 4 low, these last few years if its a GM half ton it may not even have low range. A lot of the newer pickups have a lot lower first gear in an automatic transmission then they once did as it was common at one time for a gas engine truck or even the older diesels to just sit there and bog the engine due to the torque converter stall point and not enough torque was generated on reasonable traction to even spin a tire or get out of its own way up a steep grade and 4 low HAD to be used to get enough power to four tires to get them turning. These days traction control systems may hinder a vehicle in a situation like that although that means a tire or tires are spinning so in some ways the traction control can reduce wild spinning and anyone can correct me on that but I think some vehicles cut traction control off in low range ?. By the sounds of it and you may have the proper equipment but if your responsible for helping vehicles out if they are not able to get out under their own power, I would say to be using a nylon tow rope or have one available so that one is able to give a bit of a run to help sling shot them some initial momentum as most tow straps are made out of polypropylene and impart way too much shock load if used to jerk a stuck vehicle into motion but are totally fine to use if going more from almost a dead pull with the tow vehicle and they are a lot less expensive to replace if damaged. That and some soft shackles to hook onto closed loop tow hooks on the truck your pulling as well as you having the proper shackle insert in your truck so there are no bad accidents with metal clevises joining things together or chain on the end of a tow rope or tow balls being hooked onto etc flying and causing damage or worse if it lets go. Its always a challenge pulling people because some are clueless and will over run the tow rope or strap and drive over it or that risk of ramming into the back of the tow vehicle so usually a few instructions are needed to clue in the driver of the stuck truck. Yeah ... have fun out there 😉
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