<--------Royal Purple. In everything. Even the damned lawn mower. Example: '98 Mustang GT; stock 4.6 engine w/auto transmission. Used Royal Purple exclusively since I bought the car in 2001. Currently, 212,255 miles on the odometer and over 570 drag strip passes; 22 mpg highway/18 in town. No, I don't baby the car. First year I had the car it ran every FFW ModMotor race on the schedule except Epping and Norwalk. Also use RP transmission fluid. Never had a failure even with a transbrake in this car (3450 lbs.)
I would love to use Royal Purple, but I do so much work on the engine that I seldom get 1000, or even 500 miles, before I have done something to the heads, swapped a cam or intake, or something that makes me have to swap the oil. I guess I could drain the oil first, and reuse it? I do that alot with my coolant, for the same reason stated above... I would easily pay the extra for the Royal Purple, it has a VERY good reputation. I still would swap it out at 10000 miles max, regardless of their recommendations. Probably closer to 5000 miles... What about adding Lucas to the Royal Purple...is that recommended? I currently use Castrol 10w-30 with a quart of lucas. I like how "slippery" it is and how it bumps up my oil pressure a bit.
I use Castrol 10w30 in the winter and 10w40 in the summer. I change it every 3,000-4,000 miles. My dad had an '84 Mustang GT, got 350,000 miles out of the first 302 on 5w30 Castrol changed every 3,000-5,000 miles. The engine still ran fine, he just swapped it because he didn't trust it for as far as he drove everyday with that many miles on it. He then got 250,000 more miles out of the '89 302 he put in on 5w30 Castrol. Car was drove very hard on a daily basis and we drove it all over the united states. He sold the car with around 600,000 miles on it and the kid he sold it to kept driving it for 5 more years before wrecking the crap out of it. His current '95 GT has around 200,000 on it (odometer died at 186,000) and still runs great. My grandpa runs mobil 1 in all his vehicals, changes the oil every 15,000 and the filter every 5,000. He got 463,000 miles out of his old '81 Dodge Ram 150 pickup like that. Truck still runs fine, but he parked it due to rust (truck came from up north).
According to my uncle, who is a certified master technician with all small engine brands and has been working on them since the 60's, there is no reason to run anything other then the absolute cheapest oil you can get in your lawnmower. Stock small engines are designed to run on just cheap non synthetic oil. Even most race karts (highly modified 5hp briggs engines) don't run automotive synthetic oil.
If your engine has alot of miles on it you might want to try the Castrol High Mileage oil. I switched over to CHM oil on my daily driver with 119,000 miles on the clock. It seems to have slowed the seepage oil leaks. Ken
Yes, you can. I change the filter and add one quart at 5000 miles. Full change at 7500 miles. No way in Hell. Once you use the RP you should toss that Lucas crap out the window.
You mean to tell me that you have to change that oil? I thought that the factory oil that was in the car was put in there for the life of the vehicle. At least thats the way it always worked out for me... when the engine quit working all the factory oil was used up! Just kidding! just pick a decent brand and weight. They all meet the specs. Don't use any additives and change it regularly. How often is really up to you. If you change it monthly you will wear the engine out with your oil changes and if you change it once a year you will end up with lots of sludge building up. Anywhere between 3 and 6 months will work fine with modern oils. note: always change your oil hot - that way most residues will come out with it.
Now this one I have heard of....the idea being any dirt or metal particles will still be in suspension in the hot oil when you drain the oil instead of resting comfortably at the bottom of the oil pan. I never do it though...something about burning myself....
I do always change my oil with the engine warm, but I have never heard of excessive oil changes wearing an engine out...
