I have used this oil exclusively for the last 2 years and have been very happy with its performance. It lubricates very well and even includes a fuel stabilizer. I don't believe it is a full synthetic but a synthetic blend. I have cut in 90°+ days and -10° days and it has not let me down yet. I would definitely recommend it to anyone considering it. I just purchased a 1 gallon bottle instead of the small 2.6 oz premix bottles I have been using.