Review on Lubegard 30901 Bio/Tech Engine Oil Protectant, 15 oz. - Enhance Performance and Extend Engine Life by Joseph Whiteman

If you are not using Motul 300V or Redline Oil, this additive will help where other oils are lacking. The esters help with film strength, quiet noisy engine internals and help reduce fuel economy/increase mpg. I think this works best in PAO based oils as Group 4 is totally non-polar; even lower than Group 3 synthetic oils. Too many people get excited about Group 4 oil as the only true synthetic oil, but fall silent when Group 5 oils come up because they do everything better than the cost factor. When you buy biotech you get that ether superior to all others. This supplement contains a lot of molybdenum and little boron. These esters are also said to help with leaks, as esters swell rubber seals a little. After changing the oil and checking the oil level, the blue tint is easier to see. The company has long been present in the USA and has a good practice. If you have noise from timing chains, pushrods, etc. this won't fix it, but will reduce it 🤫 and set a protection margin to help. 👍