Jamie Whincup has moved to explain his side of a tumultuous Supercheap Auto Bathurst 1000 that saw the championship leader lose the Great Race on the final lap.

Whincup ran low on fuel in the closing stages and was passed on the exit of Forrest’s Elbow by surprise winner Chaz Mostert.

The Red Bull Holden struggled home fifth in a dramatic end to what had already been a roller-coaster day for Whincup and co-driver Paul Dumbrell.

Whincup’s actions during the nine-lap sprint to the line following the final Safety Car were naturally the biggest talking point post-race.

Amid pleas from engineer David Cauchi for the driver to save fuel, Whincup had given little in the way of verbal response and, once back into his racing rhythm, reeled off five consecutive laps in the 2:07s bracket that were among the quickest the car had recorded all day.

Only on the penultimate lap, when team manager Mark Dutton took over the car’s radio channel to sternly inform the driver that he would run out at that pace, did Whincup begin to slow and allow his then three second lead to evaporate.

Whincup admitted immediately after the race that he “did my own thing like I always do” and that he was proud that he “went for the win” rather than conserved.

Team owner Roland Dane meanwhile blasted Whincup’s actions, reportedly telling the four-time race winner that he had personally cost Red Bull the race.

Whincup has today written a lengthy letter to fans on his personal website which expands on his side of the equation, but stops short of denying that he failed to follow the team’s instructions to slow.

“There is a bit of confusion on what was going on after the final Safety Car which I’m happy to clear up for you,” he wrote.

“I had clear radio and knew I had the job of conserving fuel and sticking to a fuel number.

“At this point I was negotiating the most important six laps of my life on a tricky track full of sun glare and debris, and on worn tyres with no cool suit.

“I bent the rear view mirror away and had my head down doing what I do, I was fully aware of my fuel number and while I didn’t hit that number every lap I had a clear calculation on the average and was absolutely on target to achieve that number before the chequered flag.

“The thing was that the game changed when we hit the reserve fuel tank, we know it’s capacity is 2.5 laps but we had 3 to go.

“It was clear then that we were in a bit of trouble and the numbers we were working to weren’t correct.

“In hindsight… actually looking back only gives you a sore neck, we rolled the dice, gave it everything we had and ended up 5th.

“I’m sure the 12 other stories from our opposition are all a bit different, but this is our story on why we didn’t win the great race.”

Whincup also detailed his traumatic build-up to the race and the challenges that saw him almost two laps down at the halfway mark.

“I have never seen so much action and carnage in all my life and it was one of my most enjoyable weekends behind the wheel of a race car,” he wrote.

“Once again I am really proud of the fact that for the third year in a row car #1 took the battle down to the last lap of Australia’s greatest motor race.

“I have never had a tougher lead up to Bathurst since joining the team back in 2006.

“The weekend started with a bent tail shaft from Sandown which put us out of practice 1.

“We then struggled for straight line speed with a slightly sick engine which the boys had to replace Thursday night.

“The next couple of days saw two relatively heavily crashed cars – a going away present from Luffy on 888 and myself trying to find a couple of tenths that just weren’t there.

“Trying to find that speed ultimately ended when I arrowed it into the fence in qualifying at the cutting and put our starting position for the great race 3rd last.

“Combine all this with a badly balanced car which was genuinely 20th fastest in the final practice session and we were not in a good place at all heading into the final day.

“I am not sure what happened Saturday night, I’m suspecting the French Genie (Red Bull technical director Ludo Lacroix) made an appearance to the garage and we came out Sunday morning absolutely flying.

“Starting from virtually last, the mentality was to push hard and thats what we did. After 15 laps we were in the top five which made up for our poor qualifying performance, but like everything, nothing comes for free and the side effect was we had another bent tail shaft and a well fatigued driver in a hot (but fast) car early on.

“As I said on tele, I was very doubtful that the tail shaft was going to last the day so I believe we got lucky (like many others) with that mid race red flag to repair the track as it allowed us to fix the tail shaft and race on to the end.

“Just as we caught our breath the next drama unfolded with me making a slight error down at the chase and running wide which had massive consequences with a spin, blown tyre and a drive through penalty,  causing us to go 1 3/4 laps down.  There was talk at this stage to circulate and save tyres for the next round but in my mind this wasn’t even an option.

“We were there to race and race hard and that’s exactly what we did.

“To not only get our lap back but to lead the race on the last lap makes me so proud of my team, I can hardly explain the pride.

“Throughout the entire week it seemed that the more curve balls that came our way the more it lifted the crew and the harder they worked and fought for the prize – which to me means absolutely everything.”

CLICK HERE to read the letter in full on www.jamiewhincup.com.au