Hi all, I recently found out that my 97 isuzu trooper (94,000 miles) has been leaking/burning about 1 quart every 1,000 miles and i am thinking about starting to use a 10w30 high mileage oil. I went to the local walmart and saw that they have mobil super hm and supertech hm for under 15 a jug as well as penzoil and castrol hm for around 18. What brand oil would you recommend and why? I will be changing the oil every 3000 miles.