is a 1990 auto turbo I6 motor reliable

[Isphius]

If it really has 27k miles on it, As long as you take care of it, you could have it for another 15 years before something major breaks down. And even then, Its easy to fix almost anything on these cars. Supras are good cars to have to learn how to work on cars . My car has 188k miles on it, 4k and 8 months of which ive put on, And the only thing ive replaced is the thermostat and a rear tire. Pretty good for a 20 year old car so far.