How bad is WOT for your car?

[rw19]

On all my cars I go WOT at least 6-7x a day and to add to that most of my driving is under 2 miles 3 to four times a day... I know going WOT is bad under cold conditions.

Never really follow a OCI or do a UOA. usually change my oil within 3-4k miles. Always use a top tier syn oil and a good filter (usually oem)

I am sure there are other city slickers that do lots of short tripping. When most people talk about short tripping here its like 4-5 miles. What about ultra short tripping?

And another thing I never usually own cars long enough to know how bad it is for the car. Usually sell them before they hit 100,000km.

 

[901Memphis]

Auto transmissions will wear clutches faster, so more debris in fluid.

If it's a manual transmission and the rest of the car is in good condition it's probablya good thing if your engine is up to at least 140F+.

Injectors like to be used full flow, going easy on the engine it's whole live can lead to plugged injectors.

Have you ever seen a grannied car go on a dyno? Lots of smoke.

 

[rockydee]

WOT is fine if the oil has reached operating temp [20-30 min run time]. Cold oil and frequent WOT are N/G for the engine or trans. If you're selling b4 100,000km it's someone else's problem, not yours.

 

[Clevy]

My charger required 15km at 80km/hr to reach oil temps of 150F which is the bare minimum oil temp I would even think of revving past 2000rpm.
In your case I would use a conventional changed every 3000 MILES.
You aren't doing yourself any favour running a full syn at such short intervals.
I might even go a grade thicker to combat the inevitable fuel dilution that accumulates when the oil doesn't get hot enough to evaporate anything off.

 

[artificialist]

I can't exactly prove it, but in high school, the Honda "tuner" crowd who redlined their engines regularly blew blue smoke. It hardly ever happened to Hondas driven by gentler drivers.

BMW has a way of warning people that redlining a cold engine was bad. The tachometer would move the red zone to a lower RPM until proper temperature was reached.

 

[Klutch9]

Originally Posted By: Clevy
My charger required 15km at 80km/hr to reach oil temps of 150F which is the bare minimum oil temp I would even think of revving past 2000rpm.


Seriously? How do you even get out of your own way? Under normal/light acceleration, our Fusion doesn't even shift from 1st to 2nd below 2000 RPM.

 

[Clevy]

Originally Posted By: Klutch9
Originally Posted By: Clevy
My charger required 15km at 80km/hr to reach oil temps of 150F which is the bare minimum oil temp I would even think of revving past 2000rpm.


Seriously? How do you even get out of your own way? Under normal/light acceleration, our Fusion doesn't even shift from 1st to 2nd below 2000 RPM.


5 speeds and a hemi. At those light throttle inputs I have no problems keeping up with traffic coming on the highway and on ramps.
When I first start it til the oil and coolant temp stabilize(200F for oil,203F for coolant) I manually shift it at 2000 rpm. I'm not winning any races but I'm easily able to maintain speed with the flow of traffic.
70mph is just over 2000rpm. I set cruise once I've achieved speed then almost immediately mds kicks in and I'm looking at 27mpg unless I'm into a headwind.
390 foot pounds of torque stock and I've got it tuned so consider the engine bumped a bit higher.

My drive consists of leaving my house. Immediately I'm on a grid road that is so horribly maintained I set cruise at 80km/hr. I'm on that road for 12kms then I reach the highway. At that point oil temps are around 150F and coolant near 190F unless ambient is below -30C.
From the grid road entering the highway I manually shift at 2000rpm til I reach 110km/hr,roughly 70mph,set cruise and roll.
I'm just over 40kms on the highway until I hit the city. The highway becomes the city's expressway and everything's good and hot by then so I put my foot into it a bit deeper to follow the flow of traffic.
So no problems getting out of its own way

 

[Pablo]

Originally Posted By: rw19
How bad is WOT for your car?


I can assure you thoroughly addicting. And quite dangerous.

Oh you meant my car.

 

[Clevy]

Originally Posted By: Pablo
Originally Posted By: rw19
How bad is WOT for your car?


I can assure you thoroughly addicting. And quite dangerous.

Oh you meant my car.


HA.
AWESOME.

 

[TFB1]

In 47 years of vehicle ownership, I've never had anything I didn't regularly use WOT... I did blow up the 5.0 in my T-Bird at the strip, but it had seen several doses of the funny gas, otherwise I've never had a issue...

 

[rw19]

I feel foolish now for doing it at least 6-7x a day. Its just so fun. Not to sound like a troll but nothing beats being on a redlight and going to the right lane where there is a parked car ahead and pwning all the cars stuck in traffic.

 

[Merkava_4]

It's better if you can put a load on the engine so that it doesn't rev too quickly. There's this one on-ramp that goes up a grade that I use for WOT. I get it up to 6k at 70 mph as I'm entering the freeway, but it's a slower rev because of the grade. Better for the engine.

 

[901Memphis]

Originally Posted By: Clevy
My charger required 15km at 80km/hr to reach oil temps of 150F which is the bare minimum oil temp I would even think of revving past 2000rpm.
In your case I would use a conventional changed every 3000 MILES.
You aren't doing yourself any favour running a full syn at such short intervals.
I might even go a grade thicker to combat the inevitable fuel dilution that accumulates when the oil doesn't get hot enough to evaporate anything off.


Not all cars take that long to get up to temp.

In this thread the oil is up to 150F in about 5 minutes.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/3120761/2

2,000 RPM is sort of an arbitrary limit IMHO.

 

[Doog]

I only run WOT when getting on the freeway. My commute is 2 miles so I run syn oil 5000 miles due to severe service. I use fuel system cleaners every 20k to keep the fuel system clean. I drive about 6k stop and go per year and 14k long distance highway trips of 350 to 1500 miles.

 

[Rand]

Did you read that thread?
in 5 min the oil went from +31c to ~~+60c

so in 5 min of highway driving it went up about 30celcius. or about 54degrees

it was also aprox 25C out.

put that into say.. todays weather in ohio.

it was -15C out. so in 5min of highway driving it would be 15C

I'd say your post is inaccurate.. besides the fact that the car you mention even has an water to oil cooler that also heats the oil faster.

My subaru takes about 5min for the water light to go out (aprox 150F) thats driving.. or 15m of idle.
The oil filter is touchable after 15min drives probably about 140F.

Obviously weather and car plays a large part in how fast it heats up.
Originally Posted By: 901Memphis

Not all cars take that long to get up to temp.

In this thread the oil is up to 150F in about 5 minutes.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/3120761/2

2,000 RPM is sort of an arbitrary limit IMHO.

 

[rw19]

I wonder why car companies arent installing oil heaters. Most people where I live drive very little!

 

[A_Harman]

I agree with 901_memphis that the oil temp should be at least 140 F before revving the engine up. If you don't have an oil temperature gauge, wait about 5 minutes after the coolant stabilizes at operating temperature.

 

[rw19]

If you dont have a oil gauge i recommend you boys buy a bluetooth OBD2 reader that hooks to your phone. You can check the temps off that and its like 20 bucks on amazon. Not great for code scanning but excellent for checking your load values, coolant temp, oil temp, rpm, so and and so fourth.

Beats buying a oil temp gauge and installing it!

 

[KitaCam]

Originally Posted By: Clevy
Originally Posted By: Klutch9
Originally Posted By: Clevy
My charger required 15km at 80km/hr to reach oil temps of 150F which is the bare minimum oil temp I would even think of revving past 2000rpm.


Seriously? How do you even get out of your own way? Under normal/light acceleration, our Fusion doesn't even shift from 1st to 2nd below 2000 RPM.


5 speeds and a hemi. At those light throttle inputs I have no problems keeping up with traffic coming on the highway and on ramps.
When I first start it til the oil and coolant temp stabilize(200F for oil,203F for coolant) I manually shift it at 2000 rpm. I'm not winning any races but I'm easily able to maintain speed with the flow of traffic.
70mph is just over 2000rpm. I set cruise once I've achieved speed then almost immediately mds kicks in and I'm looking at 27mpg unless I'm into a headwind.
390 foot pounds of torque stock and I've got it tuned so consider the engine bumped a bit higher.

My drive consists of leaving my house. Immediately I'm on a grid road that is so horribly maintained I set cruise at 80km/hr. I'm on that road for 12kms then I reach the highway. At that point oil temps are around 150F and coolant near 190F unless ambient is below -30C.
From the grid road entering the highway I manually shift at 2000rpm til I reach 110km/hr,roughly 70mph,set cruise and roll.
I'm just over 40kms on the highway until I hit the city. The highway becomes the city's expressway and everything's good and hot by then so I put my foot into it a bit deeper to follow the flow of traffic.
So no problems getting out of its own way


Now I can see how you're getting the good MPGs you mention in other posts...you drive that war horse like a parade pony...or...like a Camry!

 

[Clevy]

Trust me. I get my foot into it. That's how I know it will do the 160mph on the speedo however there's a time and a place.
If I've gotta do some running around in the city I'll get my foot into it to get in front of traffic and I love peeling off the line but on my commute to work there's no reason I can find to drive like a maniac.
Once oil temps reach 180F then 5500rpm shifts. Considering I can do 100mph in 3rd gear I need a lot of highway to have real fun.
But yep,driving her like a Camry,which is likely why I'm getting Camry-like fuel efficiency.
I love cars with power. Knowing its there gives me that warm fuzzy feeling,using it gives me that hot tingly feeling.
This car will go from 60mph to 100mph in less than 4 seconds which is definitely the hot tingly feeling.
I'm glad there's this car to be honest. A guy had to buy a GTP if he wanted a domestic family sedan that was able to excite him from time to time. Now that same guy can buy one of these. Its a sport sedan that can go from the grocery store to the track and gets the mileage of a much smaller 6 cylinder import n
I was never a dodge guy. I've owned many but only because the price was right.
In fact last winter I got that hemi quad cab because it was very inexpensive but I began to appreciate what a hemi was capable of as far as durability and dependability from owning that truck.
And mds is just amazing. Flawless in how it works and the mileage increase is significant.
I'm a mustang guy through and through and I love the Windsor small block however the hemi is definitely carving a niche in my heart as far as being a dependable daily driver capable of blowing your hair back at will.