Since I only do 5k intervals, I was wondering what y'alls opinion is on ST vs Travellers (Tractor Supply) in 5w30. I can get ST for $11.44 /5 qts or Travellers for $19.99 /2 gallons. I have a 7qt sump. I run MC 820s's and do 60/40 hwy/city. 111k miles, no burning, easy driving. West Texas summer coming up!