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2008 Kluger GSU40R Engine 2GR-FE Vehicle purchased with 120,000kms. It was only 2yrs old with predominantly freeway driving - so very easy life. Since the, I've touched on 10,000km per year. Problem I think is because the car is hardly used and just takes me to the train station and back on most days. So plenty of cold starts and limited travel. Transports the whole family wherever on weekends. Serviced every 7.5k since then. 1) Before replacing oil I use Wynns Engine Flush 2) I replace with Gulf Western 10W-30 semi synthetic oil and genuine filter. 3) Then add Wynns Engine Tune Up and Oil Stabiliser. Recently, experiencing an engine knock intermittently at startup. Does not happen immediately after on second startup. So once in a blue moon. Sounds exactly like this youtube video (not mine). Research has led me to the TSB0094_09 for which my VIN falls within the given affected vehicles. Will validate the TSB is the fault when i take it to Toyota to check if the computer throws out the given codes. Very expensive fix unless anyone can advise alternatives. More so, I've just purchased a 2012 Lexus IS350 with the 2GR-FSE motor. VIN not listed on this TSB so phew for that! However can anyone suggest where I may have gone wrong in my servicing regime above OR was this just an inevitable consequence of bad design flaw affecting just some motors?