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GT5 power variations explained

Guide | Friday April 01, 2011 by Milouse | 54574 reads |

You've probably wonder at least once why the power of a car you own in Gran Turismo 5 doesn't match the data you found on internet, whether it is on mygranturismo.net or in a message on your favorite forum. Answers follows...

The total power value of a car is subject to three different variations that combines to multiply the base power. The overall result seems complex, but underlying rules are quite simples if we consider variations separately:

 

  Variation Range New Car
Start at...
Increase Top Decrease
  How much? How? How long? How much? When?
Short Term Variation +5%
-5%(1)
0% Instant +5% Do Oil Change (250 Cr.). Also included in Engine Overhaul. 0-200 km (124 mi.) since New or since last Oil Change (or Engine Overhaul)  -5%
linear
from 200 to 300 Km (124-186 mi.) since last Oil Change (or Engine Overhaul)
Middle Term Variation 5% 5% Instant +5% Do Engine Overhaul (on high mileage car) 0-5000 km (3098 mi.) since last Engine Overhaul (or car New) -5%
linear
from 5000 to 15 000 km (3098-9294 mi.) since last Engine Overhaul (or car New)
Long Term Variation 3%(2) 0%(2) +3%
linear
Just drive from 0 to 300 km (186 mi.) Thousands of km/miles Around -3%(2) Over tens of thousands of km/miles

These informations are based on current knowledge of the game at www.mygranturismo.net and is subject to future updates.

(1) : Old oil usually end to a car losing the benefit of the 5% gained on last Oil Change. But we observed an additional 5% power decrease on a car driven several thousands of km without Oil Change ; in this case the Oil Change resulted in a 10% increase (5% recover + 5% usual benefit)

(2) : Due to the very small – in both quantity and speed - power loss that occurs on cars with very high mileage, it is very  difficult to measure the actual maximum decrease.

Percent in table are percent boost from the current power of the car. For exemple, a new car with a power of 500 will reach 525 after Oil Change.

 

The above table explain why, when you buy a car and apply Oil Change, then the Power seems to vary in an odd way in the first 300 km (186 miles), as Short and Long Term variation are part of the equation, one rising while the other is declining.

 

Practical advices:

  • #1  As read on table, doing Engine Overhaul is useless before 5000 Km, and makes a real sense around 15 000 km (if you really need these 5% power increase).
  • #2: It is useless to do Engine Overhaul and Oil Change at the same time, as the former already include the later.
  • #3: Oil Change is useless until the car has been driven +200 km (124 miles) since last Oil Change, and makes sense at +300 km (186 miles)

 

N.B. : Power and torque (for the RPM displayed on UI) evolve in exact same proportions, this article covers both datas although mentioning power only.

You need to be connected to post comment
message #13 | Sunday December 09, 2012 | Josue | Report
thanks
message #12 | Wednesday July 11, 2012 | J24681357 | Report
i didnt even know that. Thanks for info.
message #11 | Friday April 20, 2012 | Milouse | Report
Body rigidity can't be benchmarked, so chassis maintenance scope is hard to know unless Polyphony Digital provide datas about it.
By the way, i don't see much interest into such "feature" (is it?) in a game released in 2010, i hope PD will drop this in GT6.
message #10 | Thursday April 19, 2012 | Turismo_jc | Report
I haven't had the slightest idea the car could lose sooo much power with mileage and so much handling from colliding. BTW does chassis maintenance reset the whole body,or,does it restore something like 80-90% of the former rigidty? i'd love to know about it. BTW this article just saved me about 5% of my Premium Mustang '07. i'm a wall rider and car smasher and yes,i can tell it's not good for the cars...lol.
message #8 | Sunday June 05, 2011 | DannyBorgir | Report
@Milouse: you're absolutely rigth, so don't be sorry the site it's great! :)
To me the chassis maintenance it's an option that should'nt be there.
message #7 | Sunday June 05, 2011 | DannyBorgir | Report
@DarkIncubus: thanks, great answer! ...and as for used car (with thousands of miles) I noticed that installing the chassis reinforcement makes a huge difference but not as much as performing the chassis maintenance too (probably 50-50)
message #6 | Thursday June 02, 2011 | Milouse | Report
@DannyBorgir: As chassis quality decrease is impossible to measure, I did not work on that part of the game, sorry.
message #5 | Thursday June 02, 2011 | DarkIncubus | Report
@DannyBorgir: I don't have really hard facts, but something in the 3000-5000 km range is the time when it becomes advisable. The only car I really 'power used' was the F2007 in the Ferrari Seasonal. The effect is hardly noticable at first, and you usually adjust to it over time. But at one point I started to wonder, why I couln't reach the lap times I once did. So I compared it to a factory new one and it has turned decidedly sluggish and loose ended.
Another point abou the chassis maint is probably, how rough you are
handling the car. If you've got a new car, it becomes available as soon
as you put the first scratch on the paint. So if you keep hugging the walls and shove your opponents out of the way, it might be earlier.
And since Engine maint is 30% and Chassis maint is 50% of the new value (until it reaches 500k max) is probably cheaper for any Premium car with a value below 1 million to simply buy a new one. ;)
message #4 | Wednesday June 01, 2011 | tim8552 | Report
Good article
message #3 | Saturday May 28, 2011 | DannyBorgir | Report
yeap! very helpful! also it would be great to know when makes sense to perform a "chassis maintenance" since this is the most expensive service.
Thanks!
message #2 | Tuesday May 17, 2011 | petergyht | Report
Very helpful indeed thanks
message #1 | Friday April 29, 2011 | KKCKingOfTime97 | Report
lol very helpful!!!
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