I've been using SuperTech High Mileage Full Synthetic 5W-30 on all my vehicles.I'm sure this question has been asked countless times but I can't seem to get read data. I'm running a 5.0 Ford engine.
I'm looking to reset my budget on oil cost. However I don't want to use poor quality oil. I'm reading differing opinions
on Synthetic vs Synthetic blend 5W20. I currently use Super Tech by Walmart. I understand it's produced by Warren. I change oil and filter every 5-7,000 miles.
80% open road miles. Engine currently has 184,000 miles. Doesn't burn any oil between changes. Should I stay with what I currently use or move up to something like Motorcraft or AmsOil? Also, Is it really a good practice to run oil 10-15,000 miles? Is it a waste to change it every 5,000? Thank you in advance for your assistance.
I like it's additive package with high levels of anti-wear additives: phosphorous and zinc, and detergent additive: Calcium.
I also like that it's Dexos 1 Gen 3 approved, so it should do well in preventing sludge and varnish deposits.
My only concern about the SuperTech High Mileage Full Synthetic oil would be how effective are its seal conditioners to swell your engine seals to help prevent oil leaks. I have seen a few posts on BITOG about people using Pennzoil HMFS and Valvoline HMFS with them saying those oils helped to stop an existing leak. I was unable to find any posts about people saying SuperTech HMFS helped stop an existing oil leak, so it's unknow if it's seal conditioners are effective.
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