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firstly, thanks so much for the all replies, appreciated for your all help. and sorry for the late reply as I was in china last couple days and the internet is a huge problem there, for me at least. here are some updates from my side: - my technician did the compression test last week, the results are, 79/78/72/76 for the all four cylinders. - we also planned to do the oil analysis for the next week. (as my oil and oil filter just changed recently my technician here advised me fly at least 5-10 hours to get realistic results) also there is only a one company (name is EmAir) who is official partner of Lycoming here in Turkey so I think I will have no issues about getting the engine but first I need to make sure do I need it to overhaul my engine or not...? :/ after all the investigations, if I am sure that I will continue my current engine to my around the world trip, my second major concern is about the 'oil' actually. the longest trip will be flight from Hawaii to California (almost 2.100 nm and takes appx 12-13 hours flight with appx 150 cruise spd) I can fix the extra fuel issues with extra fuel tanks from turtle-pack company (an australian company) and monroy fuel tanks. However, I am not quite sure how I will arrange the enough oil on board to get the aircraft there? As far as I know, the minimum oil requirements is 6 quarts oil and max is 8 quarts oil, and if I take-off with max oil (8 quarts) on board and let's say the aircraft will burn 0.5 quarts oil per hour and after 12 hours there will be only 2 quarts oil on board - if everything goes as planned for sure..) which means 4 quarts lower than the minimum oil level.. is there anyone experienced this before, do you have any suggestions or guidelines for me, please? thank you again all, really appreciated. I ll fly to New York and Houston next week, if you need anything from Istanbul, just text me see you soon sekomel

Some ideas... https://mooneyspace.com/search/?q=Cross Atlantic&updated_after=any&sortby=relevancy&search_and_or=and https://mooneyspace.com/search/?&q=Turtle-pac&search_and_or=or&sortby=relevancy -a-

Years ago when I was with a friend at Sun-n-Fun he purchased a supplemental fuel tank, that he called a "pillow tank". He had it installed in the luggage compartment of his M20K in preparation for an Atlantic crossing. Sorry I can't recall any details. Also he said approval was relatively easy, but in was a German registered Mooney. Edit: I think it might have been the 18 gal Turtle-Pac, as noted half way down the linked page https://www.airmodsflightcenter.com/ferry-tank-installations

The NTSB Report on this accident is now available on line here: http://www.ntsb.gov/aviationquery/brief2.aspx?ev_id=20101125X11507&ntsbno=WPR11FA059&akey=1 The report has findings (excerpts cut and pasted below) which are at odds with an earlier post by the pilot of the other aircraft VH-PPP was to fly in company with. Significantly, there were some sobering findings that remind us there are risks when you operate outside of the envelope. In summary, there were four items that, each in isolation should not have contributed to the crash, but in entirety might have compounded a normally insignificant event into a tragic outome. The pilot was well qualified and experienced (including aerobatics), but it would seem none on the Mooney airframe except for the flight from the point of purchase.. The aircraft was approved to operate at MTOW plus 15% over but calculated to be about MTOW plus 22%.. The fitting of the ferry tank bladder was not in accordance with the Special Flight Permit issued by the Australian Civil Aviation Safety Authority, in that it was not properly secured and relied on being a snug fit between the sides of the fuselage and some suitcases to prevent aft travel. The post crash W+B determination found the CG was 0.79 outside (aft) of the envelope. The NTSB inspection could find no reason why the engine should not deliver power. There was also some discussion about the erratic operation of the Autopilot. The paperwork and other documentation for MTOW plus 15% was provided by a very experienced ferry operation in Kempsey, NSW, Australia who have facilitated the import of quite a few M20R and M20TN into Australia (including 29-0363). FERRY CONFIGURATION INCREASED MTOW The Operating Instructions for the ferry tank system referred to Mooney engineering instructions, which allow for a one-time 15 percent increase in maximum takeoff weight (MTOW) totaling 3,873 pounds. Under this condition, the center of gravity range must be between 47.5 and 51.0 inches. Additionally, the never exceed speed (Vne) varies linearly between 174 knots at the airplane's standard MTOW of 3,368 pounds through to 124 KIAS at 3,873 pounds. (the calculated MTOW was 4,128 lb) Here are the CASA documents relating to the Ferry Authorisation. It seems they were released under the FOI (Freedom of Information). http://www.casa.gov.au/wcmswr/_assets/main/lib100096/foi-ef11-2905.pdf FERRY TANK SYSTEM Examination of the airplane wreckage revealed that no bladder tank support straps were installed. The bladder was additionally equipped with orange tie-down straps, stitched into the bladder material, but these were also not attached to the fuselage structure. The aft seat belts were still in place, and had not been removed to make room for the tank straps. Examination of the bladder tank fragments revealed that it was a 238-gallon-capacity air cargo type, manufactured by Turtle-Pac. Two 7-foot-long sections of 1/2-inch thick plywood had been installed across the full width of the fuselage spanning from the back of the front seat through to the baggage compartment. The plywood obscured access to the aft seat belt anchor points. Additional plywood strips and foam padding were located along the inner fuselage sidewalls. The airplane was equipped with baggage tie-down straps. The lower straps were located underneath the plywood, and as such, were obscured from a position where they could be utilized to secure the baggage. The pilot installed the fuel ferry system, 2 days prior to the accident. Review of the airplane's maintenance records revealed that on November 23, 2010, a certified Airframe and Powerplant mechanic found the airplane's ferry fuel system fit for flight. In a subsequent interview with the IIC, the mechanic stated that he observed yellow tie down straps installed over the bladder tank at the time of the inspection. The pilot of the other Mooney stated that prior to departure, the tank in the accident airplane was positioned behind the pilot seat, and held in place by the airplane's sidewalls and luggage in the aft baggage area. Fueling records obtained from Gavilan Aviation, Inc., revealed that the airplane was serviced with the addition of 210 gallons of aviation gasoline at 1730 the night prior to the accident. The pilot of the other airplane reported that the wing fuel tanks were emptied during the installation of the ferry fuel system, and as such, the fuel purchased reflected the total fuel onboard. WEIGHT AND BALANCE A weight and balance report, dated November 2004, was located in the airplane. The report indicated a basic empty weight of 2,400.4 pounds. No weight and balance sheet referring to the airplane in the ferry flight configuration was located. The following approximate loading information was garnered during the on-scene, and follow-up examinations. The weight within the forward cabin area, which included the pilot, baggage, water, and the fuel transfer pump system, was about 285 pounds. The aft seat area, which contained the bladder fuel tank, its associated plywood supports, long-range radio, and an assumed total fuel of 121 gallons, was about 722 pounds. The equipment in the aft baggage area totaled about 187 pounds, and included both aft seats, plywood supports, additional water, baggage, and a life raft. According to the Mooney Pilot Operating Handbook (POH), the maximum allowable weight in the baggage area was 120 pounds. The wing fuel tanks, with a usable capacity of 89 gallons, were estimated to contain about 534 pounds of fuel. Based on these values, the airplane's weight at takeoff was about 4,128.4 pounds, 255.4 pounds in excess of the MTOW in the ferry tank configuration, and 760 pounds beyond the standard MTOW. Extrapolation of the weights and cargo positions based on the Mooney loading graph, resulted in a center of gravity position of 51.79 inches, 0.79 inches beyond the aft center of gravity limit. ENGINE OPERATION No anomalies were noted, which would have precluded normal engine operation. Refer to the public docket for the complete airframe and engine report. THE PILOT The pilot was an Australian citizen, and his flight experience information was provided by the Australian Transport Safety Bureau (ATSB). Review of his logbooks by the ATSB revealed that the last entry was recorded on April 24, 2010. At that time, he had accrued a total of 2,540.3 flight hours. The records revealed that the pilot had flown seven multi-legged international ferry flights, three of which were on the same initial route as the accident flight. No prior Mooney aircraft experience was noted in the logbooks.

I have an 18, 60 and 160G turtle-pac available for rent. Aerodon