# What oil do you use? **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [December 2, 2007, 10:20am UTC](https://forums.speedlife.net/t/what-oil-do-you-use/193971 "2007-12-02T10:20:35Z")\ **Posts on this page:** 1\ **Showing post:** 52
**Author:** ![VdubSPEEDracer](https://avatars.discourse-cdn.com/v4/letter/v/f08c70/32.png) [@VdubSPEEDracer](https://forums.speedlife.net/u/VdubSPEEDracer)\ **Post date:** [January 15, 2008, 12:16pm UTC](https://forums.speedlife.net/t/what-oil-do-you-use/193971/52 "2008-01-15T12:16:58Z")
> [@I want to make Tshirts... i need a good blank t shirt](https://forums.speedlife.net/t/i-want-to-make-tshirts-i-need-a-good-blank-t-shirt/33554/25): > > amsoil full synthetic 5w-30 engine oil > amsoil full synthetic synchromesh 5w-30 tranny fluid > > love them both tranny shifted so much nicer and this was changed at about 5k miles on the car > > the valve train on my engine makes less noise now and i HONESTLY get better gas mileage also > > i still change the oil every 5k not like amsoil rec at once a year or 15k miles I know it was already mentioned but I also run Amsoil fully synth. and its a 25K or 1 year interval now (with their filter), I had mine tested about 1/2 through the year which was at the 5500K mile mark and the blackstone lab results came back great with a TBN at 5.1 (active additive) 1.0 is low, told me to check back in another 3K, my year is up in the spring in which I will have upwards of 11-13K miles, I will take a sample on my year end oil change and then pending results, most likely just stick to the 1 year intervals… --- _[View the full topic](https://forums.speedlife.net/t/what-oil-do-you-use/193971)._