My 2014 analog gauge is always at 220.

 

That coolant temp is not unusual. Engines since at least the C5 have run higher temps.

 

On the 2014 doesn't the analog gauge read a steady reading slightly higher than actual (and the digital readout) once it is up to temperature? My 2016 Z06 stays around 190 under normal driving conditions (both digital readout and the fake temperature gauge in the DIC area, with the Z06 the dedicated analog coolant temp gauge is replaced with the manifold pressure gauge).

GM did the same "stabilized" temperature gauge thing with my 2018 GMC 2500HD which stays steady on 210 once the engine reaches operating temperature but reading the actual temperature via the OBD II port it is running around 185 degrees while the gauge is showing 210 and as expected the actual temperature varies some around that with normal operation even though the analog gauge doesn't move. I suspect the somewhat fake gauge won't move off 210 until the actual temperature moves from its normal point to above 210 and that is probably the same way the gauge in your 2014 is working.

I understand that having a steady gauge reading is reassuring to some customers but I preferred GM showing the real temperature, which of course varies with engine load and operating conditions, instead of this buffered gauge found in the 2014 Corvette and the current heavy duty diesel pickup. Under sustained full throttle acceleration in the pickup the digital display via the OBD II port shows a slight increase in coolant temp as expected but since it doesn't reach 210 the analog gauge never moves off its 210 mark.

 

I don't think it's normal on the C5 and C6. My C5 ran a normal 185-190, and very seldom went over 200. If I was caught sitting in traffic on a 90+ day with the air on, it would climb to 220-223 and the fans would kick on high. As soon as I stated moving, the temp would drop back to around 200. I never saw it above 200 in normal driving, just when I was stopped for a prolonged period on a very hot day.

My C6 Z06 runs 192-196, except when in traffic and it will go to around 205. As soon as I start moving, it will drop down to around 200. Extremely rare to see my temp age go to 220. Even running hard at 160 MPH, the temp goes up to no more than 210 and when I do a cool down lap, it drops down to around 200. I've driven across Kansas on I-70 when the temp was 105 at 80 MPH and my coolant would be around 195-200. I've driven slow in St George, UT, when the Temp was also 105 and my C6 Z06 would be around 200. Climbing Pikes Peak in first gear at 1500-2000 RPM, the temp climbed to around 210. Coming back down the little hill, it was running at 192.

My supercharged Mercedes runs at 185 all day long, and on a really hot day, sitting in traffic, it might creep up to 200.


While the C7 might be designed to run a minimum of 220 degrees(thermostat design), that is not true of the C5 and C6.

 

Modern analog gauges are "compensated" the idea being that the needle stays towards the middle of the range so that the driver can quickly see that everything is normal (or not). The downside being that you don't actually know the real temperature in real time.

 

It is normal to the OP here look at the gauge in the small part of your cluster & not the temp gauge over at the far right side that says temp. Robert

 

My '14 Z51 with the new 0W-40 runs noticablly cooler. Sitting at Sonic last night in 93 degree temp and never turning the engine off following a 35 minute highway commute the temp never reached 200. Hangs in the 185-190 range and gets up to 195 and holds.

On track day the new oil gets up to 240-260 degrees and within just 2 cool down laps the oil temps would actually drop back down to 200. Within 2 laps on a 1.8 mile road course just cruising around 70-80 mph letting the brakes and engine cool before parking the oil temp drop is eye opening. I'm sure some won't believe this but that's just fine if there are any doubters.

The 15W-40 track oil never cooled down that much. Did concern me when I was first adding the oil to the dry sump as it's so much like water than thicker oil.

I'm also getting an easy 1.5 MPG increase on daily driving with the new oil and an extra unintended benefit. Great not having to change oil pre and post track days anymore!

GM and Mobil nailed this oil.

 

My C7 seldom runs above 198 unless I'm in traffic or in lower gears....

 

There is no way the new 0w40 is giving a 1.5mpg increase over the old 5w30.

 

My 2019 Z06 has got to 205 sitting in traffic on a sunny 78 degree day. Most of the time it runs around 194-198.

 

Any chance you maybe just filled with a tank of non winter blend fuel and saw this spike in MPG? Oil won't give you that increase of fuel economy. Its due to fuel and driving style, terrain your drove on, temps outside.

 

Ensure your radiator/condensator/intercooler area is clean. Mine had a newspaper page in between.

 

I agree. Wouldn't think oil would give me the boost I've seen in MPG. It's a DD taking the same 30 mile commute to work with spirited driving car has been doing for 4 years. Summer blend gas could be a piece of it although looking at it again yesterday my 1.5 MPG statement is probably actually understated. No monkeying around with my MPG reading. For the doubters out there just accept it or believe that my car is malfunctioning when it's calculating MPG all of a sudden after 45K miles.

As others with the 0W-40 oil have probably noticed it warms up much faster too. This is my 4th Vette and this oil is different when it comes to temps and imo MPG when I look at my facts.

 

Yes mine is always 220 when warmed up and my car has 17k miles the car runs so its actually getting better mileage and a more complete combustion of fuel !!! Wayne