3lt TD Patrol EGR story

Ive posted before about the EGR blank off and my experiences, and I notice an very interesting post a few days ago about lower exhaust temps, Anyway as I've said before I've blocked off mine and a number of others with no problems and no noticable improvements, until yesterday. A mate/customer brought his GU in for a headlight bulb about a week ago, the extended warranty on this vehicle had just lapsed. I've been pestering him for ages to block his EGR but he refused as he was concerned about warranty if she did blow. This GU is owned since new and has all ways had a very slight flat spot between 1500-2000 rpm and is noted during gear changes. Nissan had quite a few goes at it with no success and I was under the impression it may have even been the auto "flareing" on change. Anyway the owner didn't really worry about it that much and learnt to live with it. (129000kms). So last week when it was in we blocked the EGR off when changing the bulb and sent him on his way without telling him. (dont worry about the ethics, his brother in law works for me and I'd cover him if something went wrong). He rang me that night and questioned me what we had done as it had never run so well. I told him we put fuel conditioner in it, and he now wants to by a 20lt drum of it!!!. So since then hes been away towing his boat for the weekend and reckons he gets about 60k's a tank further with it as well. This is the first vehicle that I've had first hand knowledge of improving drivabillity by blocking the EGR and I thought I'd add the story to the forum.

PS I still haven't told him about blocking it off yet, I might unblock it a next service and see what happens (thats what mates are for)