Originally Posted by Yamahaman444 I had read about the 50/50 not cutting it and since I drained and refilled the radiator with distilled water, I have not had an issue. I just wanted someone to chime in and confirm that OEM can handle this ridiculous heat At least I didn't start an oil thread I have Oem and 50/50 for normal DD duties and NEVER get above normal operating temperatures while using the A/C all summer long . B.