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On a road car, I agree. On a car that is driven hard, the diff oil can get hot and deteriorate quicker (same for engine oil). 1. Why I don't strictly follow OEM intervals According to the maintenance interval for my BP, I should never change the following fluids : - Automatic Transmission Fluid - Front and rear diff oil - Steering fluid And THAT is nonsensical according to me. To give just one example, we all know that the steering fluid tend to leak on BP's, changing the fluid before it leaks is a good and cheap preventative maintenance. 2. Why I recommend a short maintenance interval Now, regarding @Conducks 's car, the maintenance interval is the following : (source: http://www.cars101.com/subaru/maintenance-2017.html) You probably notice that the Differential Fluid has to be Inspected but never Replaced. But there is a note *3 that states "under severe driving replace every 15,000 miles or 15 months whichever comes first". Based on @1randomkiwi 's comment "All those launches and helis sure take their toll.", I think that we are talking about severe driving here. Also, I personally think that the engineers that worked on the maintenance interval wrote this note for a good reason 3. Why I recommend a shorter interval than 15,000 miles (=24,000 km) for diff fluid In racing it is very common to change fluids very frequently, like changing engine oil before/after each race for example. My experience have proven that a car can go a long way with good maintenance (your mileage may vary). I have a couple mates that track cars with 200,000+km and the cars run perfectly, I don't think they would be able to do that without very frequent maintenance like they do. Considering @Conducks launches his car very frequently and his rear diff is already dying, changing the fluid every 15,000km doesn't seem overkill to me. Even though unrelated to maintenance, what @Kiwi_Fozze said is also to consider in my opinion. 4. End note I might over-maintain my cars but I am personally convinced that maintenance intervals should be shortened when you drive the car hard. That being said, you seem like a very knowledgeable person and I have the feeling that your opinion is not so different than mine. Sorry for the long post, I tried to structure it to make it easier to read though.

Venturi in the exhaust.....but wait there's more! If you buy now, I'll throw in a supercooler.....for free!!!! *old joke, those that know. Know

Pulled the whole interior out and gave it a super good vacuum and carpet clean. Happy with the result And damn are seats heavy! I can see why people strip the interior when tracking cars, be able to save a good 50kg from the legacy

Hey Welly Lads and ladettes, On the 4th of Feb in Lower Hutt they are having the event "Hard Park" again. This event is great to get out and meet other people in a strictly park up family style event. Every year they let you in early to park together if you have a club or crew. Would any of the Wellington based team (or anyone willing to travel) be interested in going in to park up for ClubSub?

Those guides are just that, a typical guide for dealers and normal drivers. Also inspect is a 'replace if needed' They are minimum requirements! For people who don't like cars and think getting to the speed limit is something that takes time. Corners also tend to scare those people too. I just change it all every year (old car was every track event too). Good thing I do as last owner didn't take care of much and car dealer signed service book without service. I've also see dealers miss things or not bother when busy. few hundred extra a year will pay off over time if you want to keep the car more than a few years.

Perhaps lifting the car up a touch may be prudent. It's well known that r180 axles don't take too well to being parallel to the ground (aka car dropped on it's arse) and tend to snap when loaded up in such a state.

Wow, looks like it happened quickly, how many km has your car made ? When was your last rear diff fluid change ? You might want to change the fluids more often if you drive the car hard, it's a common practice when you track your car and could help in your case as well. (Cusco LSD is probably a good choice if you have to change the rear diff)

I get about 400k to a tank in the sti, gotta love that boosty boosty vf42 and smaller fuel tank lol. Had an na bp legacy for a while, it convinced me never to get a non turbo subaru unless it's a 3L

Leadfoot for me

oh yeah this event is epic. Last year has over 1000 cars. Unfortunately its same day as leadfoot and that takes a few people away. I would prob only be able to come mid afternoon Sure others will be there tho

Car: 01 WRX STI Tuned: 3" Turbo back exhaust, K&N panel filter, Deatschwerks DW300 Fuel pump - ECU reflash 205awkw Fuel: BP 98 Fuel Economy: 400km to a tank with a mix of cruising and few pulls.

Hi all. I've just seen on Facebook about an awesome weekend drive with other like minded enthusiasts. Some of you may of heard of it, The event is called The Gumboot rally. The event is being held the weekend of the 7th of April. Goes from Hamilton down to New Plymouth then across to Taupo and also includes The Forgotten Highway which is an awesome road to drive, (as I have done that road a few times now). If you are interested go have a look on Facebook link below. It looks like it should be a fun weekend. Let's see how many Subaru's we can get together! https://www.facebook.com/Gumbootrally/

Should add some extra kws...

If bought privately, nope. This case shows why proper diagnostic process should be followed, rather than assuming, throwing parts at it, and hoping.

update for Furzes Model: 1996 Subaru WRX STi Displacement: 2L Mods: Custom exhaust, 4 Bar map sensor, Turbosmart 44mm wastegate, Flipped V8 STi Spec C manifold, FMIC, 1000cc Bosch injectors, Aeromotive FPR, Aeroflow Fuel rails, complete teflon braided fuel lines, stock Version 7 STi Longblock w/ Supertech Dual Springs Turbo/Boost: Steve Murch Motorsport Holset HRC35/2 22lb (ish, and for both 98 and e85) Fuel: Flex Fuel BP 98 (275kw), e85 w/ 3.5bar base pressure (302.08kw) ECU: Link G4+ Plug in Tuner/dyno: @gotasuby aka @SAS

Hey Conducks.. you have got the cash to splash and an obvious desire to drive fast .. Have you ever had a shot on the track.. I am recommending you give it a go.. Karting is a great introduction to motorsport.. You will learn race craft,setup,organisation and have a real driving experience.. Then I would suggest a formula ford as the next step in your racing career.. I know its fun to blast around the streets in your hotrod but its not going to give you any personal growth.. Get out with a pack of other drivers giving it heaps and see how good you really are.. Doing crazy stuff on public roads isn't going to win you any prizes.. From my experience after spending a great day racing in a controlled environment the last thing you will do on the way home is bust the speed limit.. Do it properly man..