AJP? He just runs old GH files.
This guide is overkill and waste of time and money. Changing your ptu oil is great idea for any SHO but you don’t need to follow SMK’s “bible”. It’s like maintenance fear mongering.
Also, lets address your maintenance fear mongering with my "extreme maintenance intervals with modern pricing......
Directly from my thread:
Future Fluid Maintenance:
At 70K miles I starting following this schedule until the car left under new ownership.
Oil and Trans Fluids will be changed at the same time, along with the PTU and RDU.
Oil: every 3k miles (Castrol Edge with either a Motorcraft or Mobil 1 filter)
Trans Fluid: every 9k miles 5 quarts out, 5 new quarts in. (Mercon LV)
Brake Fluid: every 10K miles.
Changed at 69K
PTU Fluid: every 10k miles (Redline Lightweight Shockproof Fluid)
Changed at 112K.
RDU Fluid: every 40k miles (Redline Lightweight Shockproof Fluid)
Changed at 69K
Coolant: Every Year. 50/50 mix.
Changed at 98K
Batteries: My SHO kills batteries every two years like clockwork. I replaced the battery that came with it 9/19, then 10/21 and now
8/23. Yes they are AGM.
This may seem extreme. however it is not really expensive. I buy my oil and filter from Walmart. Castrol Edge is good and less than $40 bucks with a Motorcraft filter. A case of Mercon LV is pretty cheap on Amazon. Redline is cheap (21 bucks on Amazon for quart bottles).
---------------------------------------------------------------------------------------------------
Towards the end I switched from Gold Bottle Castrol Edge to Pennzoil Ultra Platinum. I change my oil in all of my E30 cars at 3k miles regardless. This is because of oil dilution from the E30 fuel and because it is cheap.
Obviously all prices have gone up so I will be using modern pricing to do redo this using the 12k miles average from above. .
Oil Change: $49 x 4 changes: $196 a year
Coolant: $45 x 1 change: $45 a year
Trans Fluid: $70 a year or roughly $5.83 +\- every 1000 miles at the 12k mark: $81.66 a year
PTU: $26.99 x 2 changes : $54 a year (it is actually cheaper but I have to buy 2 bottles)
RDU: $26.99 initial investment for 2.5 year investment: $10.80 a year after
$196+$45+$81.66+$54+27= $406.66 a year or $33.88 a month for extreme fluid maintenance "fear mongering" is actually pretty cheap in the long run for a twin turbo, awd, performance sedan that you can work on with basic tools.
By all means, people will do what they do, but when you get hit is a $2 to 5k bill for take your pick of (Transmission, PTU, RDU, timing chain, water pump) replacement for a car worth $10 to $15k now...... the $280 - $406.66 for fluid insurance seems really reasonable IMHO.
Oil protects the timing chains, guides, and tensioners.
Coolant protects and lubricates the internal water pump.
Clean Transmission fluid protects and lubricates the transmission.
New Fluid protects the lubricates the PTU from baking and and controlling thermal runaway from use and exhaust heat.
RDU is probably the least of our problems, but every 30 to 40k miles for $27.00 is literally a no brainer.
Even doing extreme maintenance will not guarantee failures, however they will provide just that more protection.
So take that for whatever it's worth, and do what you need to do. I don't own anybody's car and if they want to take my advice and follow it, it certainly wont hurt.
For reference, my Merc's oil changes start at $290. I have to have a certified repair/service center do all services, because that is the stipulation of my extended warranty. That single oil change is roughly a single year of a moderate SHO fluid program for context.