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I have a few gallons of 5W-40 fully-synth API SJ motor oil. I've had it in my garage for 2-3 years in a sealed drum. Is there any likelihood of any deterioration of the oil's properties, or can I use it without worry?

Did some temperature measurements on my FWD 5-speed transmission at the weekend. Car is a Mitsubishi 2000cc sports car with 5-speed transaxle. It is filled with SF SynchroGlide gear oil. Air temperature was about 27C (80F). I did a 25 mile run on twisting UK roads with speeds 50-90mph and...

In considering SF's MTL-P and SynchroGlide for my manual transmission I noted that the SynchroGlide has a much higher Viscosity Index than the MTL-P. This means that its viscosity changes less with temperature and consequently it is much less viscous than MTL-P at low temperatures. Now, most of...

I intend to change the ATF in my '98 Maxima. The car has only done 38k miles and I last changed the fluid about 2 years ago. The handbook calls for 'Nissan D-Matic' (which I assume is a Dexron III equiv.??). Any benefit in going to a synthetic on this car, and does anyone know if there is...

My Mitsubishi 5-speed is spec'd a 75W-85 or a 75W-90. With the SF MTL-P in there the gearshift is much better than it used to be (when it had RL's MT90 in it) but it is still quite 'notchy', especially when cold. I can live with it, but its not great. Anyway, I had a local transmission...

My gallon bottle of MTL-P arrived here in England about 6 weeks after ordering it from MolaKule - not too bad a shipping time and thanks to MolaKule for shipping it out promptly and USPS for not losing it. The cap had a crack in it, but fortunately no oil had leaked out. I just drained the RL...

Having done a little research on the Internet it seems that many vehicle owners/technicians avoid the use of synthetic gear oils because they are 'too slippery' for good sychro performance. They prefer mineral gear oils, which they claim give better synchro 'bite'. I am aware that good quality...

Took my Mitsubishi sports car out yesterday and paid particular attention to the shift behaviour. It currently has Redline MT90 in it (although I have some SF MTL-P on order). I am still trying to educate myself about synchromesh operation etc. and wonder if anyone can explain the following...

OK, I know the basics of how baulk-ring synchromesh works - but here's a question: On my Mitsubishi I get some synchro 'crunching' on a 2-3 upshift - presumably due to some wear or deficiency on the 3rd gear synchro ring. However, I can do a fast downshift 4-3 with no crunching. Why is this? I...

I recently bought myself a Mitsubishi FTO - this is a small Japanese-market front-wheen drive sports car with a 2.0l V6 engine . Its has a 5-speed manual transaxle and the car has only 20k miles on it (its a very clean and 'tight' car so could even be genuine miles....). Anyway, the engine...