So at 104,000 miles shall I continue with regular 5W-30 or shall I go to synthetic or full synthetic? Scotty mentioned in one of his videos about an older car started to leak/give problems by using synthetic...so he kept it at regular oil. I don't care about what brand to use, I just want to know if I should keep using regular 5W-30 or go to Full Synthetic on my 2005 Sienna?
I would stay with regular, mineral oil, or maybe even a synthetic blend. I wouldn't waste the money on full synthetic.
I would go for the regular oil. Cheaper to buy and it really does not make difference for your car. The important thing is to change the oil and filter frequesntly.
Full synthetic oil is fine on that one it doesn't bother Toyota engines they're well made
Thank you soo much Scotty.