I have used synthetic oils for 20 years in my personal vehicles, I have converted literally thousands of pieces of equipment to synthetic oils, I have had friends convert their personal vehicles over to synthetic. Never a single failure only improved power, fuel economy, lower heat and less failure of alternators, starters, a/c compressors and water pumps. The only time I dont recommend synthetics is if there is an existing oil leak, synthetic will leak more.

The theory of hurting an engine by making a switch to synthetic was fabricated by the petroleum companies.