rather than use hi-mileage oil, i want to chosse (can you all help me) between texaco synthetic, or full syn supertech (walmart) or 7500 mobil. This would be for 2 beaters my wife and i have - 95 geo prizm (1.6l 4-cyl auto) and 92 plymouth voyager (3.0 mitsu v-6, 3-spd auto)
thanks in advance -...