I have used it a lot over the years. Almost exclusively in one car and it did very well up to 125k; no significant problems. I noticed condensation and varnish inside the fill cap often though; nothing terrible, so I switched to Valvoline Syn and Pennzoil Syn last year and they have greatly reduced (eliminated really) that. I can see both brands working on/removing the varnish down inside the fill hole as well, which has really surprised me. Overall, the oil has served me well over the years, but honestly I spend a little more on oil now to reduce the aforementioned issues in my newer cars due to a lot of short tripping.