2015 Silverado LTZ
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Hey y'all. I recently got me a 2015 Chevy Silverado LTZ Texas Edition. I have final put a put a few miles on it and it is time to change the oil. My question to any of y'all who have or do own this model of truck is this. I would imagine that the previous owner and dealership probably used conventional oil on this truck would I do it harm by switching to synthetic at this point in the game? It has exactly 40K miles on it as I type. I was reading that by switching to synthetic oil and draining the differential and putting synthetic in there I could gain mpg. I get pretty decent right now. I average 19.5 in the city and when I took it out of town on the highway I got 22 mpg on that tank.
Also one other question. I see that they put in a 200 degree thermostat from the factory. Would it hurt to go to a 180? |
Re: 2015 Silverado LTZ
Do not switch to a cooler T-stat. These rigs have a 200 degree T-stat for a reason. The modern engines of today run more efficient at a slightly higher temperature than the engines of yore. You'll do more damage than good.
Gary |
Re: 2015 Silverado LTZ
Crazy. Seems counterintuitive but that is why I asked. How about switching to synthetic in the motor and rear end? Any input from any of you guys? I plan on changing my oil this weekend and have been thinking about it. Which synthetic oil would y'all recommend?
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Re: 2015 Silverado LTZ
How many miles???
Any of the name brand synthetics are fine to use. Even the house brand at Wal Mart, HoReilly's and NAPA are usually bottles by Ashland, the company that makes Valvoline. Use a NAPA or Wix filter. You need to find out if the rear end is a posi, if so, do NOT use synthetic it it. If it is a posi use a name brand 80w90 in it with the GM posi additive, If you don't have too many miles I would not worry about the rear end, yet. Just check it to make sure it's full!!! |
Re: 2015 Silverado LTZ
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Gary |
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Re: 2015 Silverado LTZ
That truck should have been running a Dexos 0w20 oil from the start...all 0w20's are full synthetic. If you run conventional oil and you have an engine issue they will NOT warranty it. It's 8qts, about a $90 retail oil change.
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Re: 2015 Silverado LTZ
I do have a question for y'all since this site always seems to have good advice. Not always but sometimes at red lights I notice that he idle is a little rough. And by rough it is pretty dang light really. It is only noticeable in the steering wheel and pedal. If I let go of the wheel it is barely noticeable. What could this be? I thought it might be cheap gas so I filled up with premium before heading to the coast and burned through it. Filled up and did it again. I got 22 mpg on those tanks so it ran fine. Just the idle.
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Re: 2015 Silverado LTZ
Any of y'all have this model truck and installed the leveling kit for the front end to be raised by 2"? I am thinking about leveling the front end and installing bigger tires. These tires just seem a little small for the truck. Last truck I owned was a 94 single cab Chevy which I leveled and put 31X10.50's on. I liked the look and would like to do something similar to this one.
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Re: 2015 Silverado LTZ
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By the way, NICE TRUCK! |
Re: 2015 Silverado LTZ
Thanks. Not bad for an almost 3 year old truck. It is I ridiculously great shape. I just got 40K miles. It came with the running boards, bed cover, and magnaflow duel exhaust. I will probably start by parking it on level ground and measuring to see what the difference is between the front and rear. I heard the rough country kit works well on these trucks.
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Re: 2015 Silverado LTZ
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Gary |
Re: 2015 Silverado LTZ
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One more question for y'all. What should my batter gage be reading while idling and accelerating? I noticed a vibration sometimes and when I feel it I look at the gage and it seems like the battery is a little low. The two pics are while idling and while accelerating while the AC is OFF windows down.
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Re: 2015 Silverado LTZ
That is normal if you dont have alot of loads on computer comands the alterantor to a lower charge setting to be less drag on the engine
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Re: 2015 Silverado LTZ
Thanks. This is the newest truck I've had since my 94 1500. All these luxuries in my new one throw me for a loop sometimes.
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