No additives are needed except in rare circumstances. Example - I had a 2010 Cadillac CTS V. At about 40,000 miles on start up it would send up a huge blue smoke cloud. Not a little smoke, but a fire extinguisher amount of smoke. It was absolutely embarrassing. This is a performance car, not a 280,000 mile stovebolt 6. My theory was fuel injector problems. I had bought it with about 15,000 Boston miles on it, but one never knows what kind of gasoline it might have taken on at some point. I run Top Tier. After the 10th smoke-out episode or so, I bought eight bottles of techron and put one in at every fill-up. I also ran a quart of Marvel Mystery Oil until my next oil change.
I don't know which/both were successful, but I put 208,000 miles on it and it never happened again. This engine ran 170 mph at 193,000 miles. It never used the first quart between changes. I still think I had a fuel injector problem, but a blind squirrel.......
So that regimen 100% solved my problem.
Techron is generally considered the best gas additive in the business, hands down. Use it if when needed. Top Tier gas has a good additive package and should keep you clean.
Marvel Mystery Oil is just that. If it was the one that worked it will forever be a mystery to me. But it too has a good reputation for engine oil internals.
Otherwise, Top Tier Manufacturer Recommended Octane and regular oil changes. I use Amsoil 5/30 Signature Oil and Amsoil Oil filters in 100% of my cars, regardless of manufacturer recommendations.
Oh, and don't put one of those high performance rag air filters on. That is a great way to provide for enhanced air flow because it lets larger particles into the intake than a regular air filter. But the rag is very adept at introducing unnecessary wear into what otherwise is a long term daily driver. Save the high performance rag air filters for 1/4 mile trips only. That extra 5 hp might come in handy under those circumstances.
Experience on oil and filter recommendation: 2005 Cadillac CTS V 176,000 miles, 2010 Cadillac CTS V 208,000 miles. 1985 Suburban 281,000 miles. 2011 Yukon XL 203,000 miles, 1990 Taurus SHO 343,000 miles.
I also use highly rated air filters. Purolater or Wix. This link will give you more info. It may not sell you, but it did me.
I don't know which/both were successful, but I put 208,000 miles on it and it never happened again. This engine ran 170 mph at 193,000 miles. It never used the first quart between changes. I still think I had a fuel injector problem, but a blind squirrel.......
So that regimen 100% solved my problem.
Techron is generally considered the best gas additive in the business, hands down. Use it if when needed. Top Tier gas has a good additive package and should keep you clean.
Marvel Mystery Oil is just that. If it was the one that worked it will forever be a mystery to me. But it too has a good reputation for engine oil internals.
Otherwise, Top Tier Manufacturer Recommended Octane and regular oil changes. I use Amsoil 5/30 Signature Oil and Amsoil Oil filters in 100% of my cars, regardless of manufacturer recommendations.
Oh, and don't put one of those high performance rag air filters on. That is a great way to provide for enhanced air flow because it lets larger particles into the intake than a regular air filter. But the rag is very adept at introducing unnecessary wear into what otherwise is a long term daily driver. Save the high performance rag air filters for 1/4 mile trips only. That extra 5 hp might come in handy under those circumstances.
Experience on oil and filter recommendation: 2005 Cadillac CTS V 176,000 miles, 2010 Cadillac CTS V 208,000 miles. 1985 Suburban 281,000 miles. 2011 Yukon XL 203,000 miles, 1990 Taurus SHO 343,000 miles.
I also use highly rated air filters. Purolater or Wix. This link will give you more info. It may not sell you, but it did me.
