Harrop 2300 supercharger to Optimiser 6500

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Originally Posted by Touses

Hi Phil,

Yep read additive and completely skipped oil.
You have indeed completed the picture for me. Now I am intrigued.
What brand is you are using and where do you source it?

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OK, its a Nulon Product, called Long Term Anti-wear engine protection with PTFE, Autobarn have it currently on special for $25 a can, I use 2 cans as a singe treats up to 6L sump volume. This is a cumulative residual treatment with the micro particles remain in situ after deposition. I simply redose at each oil change. The can says its a 12 month protection.
There is another Nulon product around the same cost, and it contains molydenum, without the PTFE, and it probably does a similar job, however is a product that is lost at each oil change, so you need to re-dose each time. I used to use molybond in the diffs/gbox and transfer case, but have changed to another Nulon teflon additive in a tube, cant remember why I changed, only that oil changes with the molybond additive seemed to be messier due to the additive - maybe my methods and housekeeping were at fault though?

I think you could find this Nulon stuff at Supercheap but price check as I am finding Autobarn are typically 15% cheaper than SC for the same item.

Many thanks for that will suss my local autobarn.

Was running the truck today to put the engine oil additive in, and let it idle for maybe 15 mins, then shut it down, followed by an eruption of frothy coolant from the main interchiller tank. I checked the flowmeters and flowrate prior had been non registering, so passed it off as a battery pack issue, but looks like the pump has been cavitating and churning the coolant to bubbles - like why now? Anyway I tong tested the power cables and they should be pulling 25amps on the main pump, pulling 15amps so the pump isn't working. I have already ordered a new tank cap as this was leaking, however starting to thin the tank may need to come out and be reconfigured for a lower pick up point as the circulation pump shifts 15LPM guaranteed and is a beast, plus might need to add a check valve in the return line I am thinking to hold the pumped liquid aftr shutdown, instead of having it siphon h=back to the tank and lose operating capacity - never ends , but then it could also be the truck was pointing downhill - dunno, clutching at straws as its run perfectly up until now, but everything has a reason , and 'whats changed' is the chant.

Righto, investigated and found the source of the leak, there was a crack in the plastic filler cap, and the inevitable foaming that takes place was releasing via that crack to ground. Simple task to fix you would think, but NO. I had been waiting for a new cap assy to arrive and despite it being the same part number, the cap threads were different and it would not screw in. This required removal of the bung in the tank, which required the hole in the floor to be increased in size, a new cover plate made, then fitment of the assy, which also needed the drivers side seat removed. Anyway, its done, no leaks, and have a spare unit for next time.
Both displays on the battery powered flowmeters appear to have given up the ghost, very hard to determine flowrates at a glance for the two intercooler circuits. I will monitor the system performance and decide later if I need to replace. Both are LCD screens, one in direct sunlight and the other in the hot engine bay, maybe two distinct failure modes???