I have used synthetic blends in my Honda Ridgeline and Infiniti M35 since the vehicles were new--all oils by Conoco Phillips. I buy 76 Super in Virginia and Conoco and Kendall in Pennsylvania, but only at distributors. I've been happy with the performance and I paid $2.34 a quart for the last case of 76 Super. When I tried QSUD in the M35, consumption went from zero to 2/3 quart every 2-3K miles. The Honda uses no oil and runs quietly and cleanly.