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Hey guys well, I can not tell you the history of oil. My guess is just normal oil from jiffy lube (whatever they use)
I started doing my oil changes and adding 10w - 40 high mileage mobil 1 on my lexus v6 rx330.
Car runs fine and no leaks. But hoping I can still keep using mobil one since where I get it from is only 15 dollars!
car currently at 170k miles and never had issues
You'll be fine. Your owner's manual will have a chart stating what types of oils you can use, and if your car took 5w-30 before, 10w-30/10w-40 would also be listed as acceptable choices, along with 0w-30 too, probably.
10w30 and 10w40 are both rated as acceptable down to -4 degrees F. 5w30 is rated down to -22 degrees. So unless you are parking outside in subzero temperatures, 10w40 should be fine.
Unless your manual says to do so, don't buy a full synthetic oil and just stick to the manual's recommendation. I don't follow any of the temps guide unless you live somewhere that's really cold all the time.
Changing oil more frequently is what I always recommend for any car. 3-4k mi changes and no more than 5k.
One of the reasons manufacturers went to lighter weight oils, 5W-30 vs 10W-40 is because the lighter oil is lower friction. Yes it's probably miniscule but it adds to there Corporate Average Fuel Economy. Before these regulations 10W-30 or 10W-40 was the recommended oils. With your mileage I wouldn't worry about it.
As far as synthetic vs dinosaur oil, that debate could go on forever. 3000mi oil changes have been the recommendation since the 60's. Engines, oils, filtration, and fuels have all changed a lot since then. Particularly the use of unleaded gas has made big difference. What does the manufacturer recommend, the big thing is short trips vs long trips. Long trips allow the oil to boil off any condensation that accumulate with short trips.
170k miles is still pretty low mileage if your driving is out of town. I have a Jeep with the Chrysler 318 (5.2L) that needed a valve job around 225,000 miles, but I didn't switch to high mileage oil until about 275,000 miles. It's got 325,000 on it now, and is still running fine, but to my ear the engine is sounds a little worn. For most of its life it got either Castrol or Mobil1 5w-30. Now I use Castrol high mileage 5w-30, which is a synthetic blend, and change oil at 7,000 miles. If I was doing city driving, I would drop that to 5,000 miles.
Any modern lubricants are miracles compared to what we used to use. I had a daily commuter once that gained 5 mpg in 9 years, just because of oil upgrades. All that friction used to go into engine wear, which is a major reason modern engines run virtually forever. I have a friend with a Ford SUV (can't remember the model) that has over 550,000 miles on the original engine.
170k miles is still pretty low mileage if your driving is out of town. I have a Jeep with the Chrysler 318 (5.2L) that needed a valve job around 225,000 miles, but I didn't switch to high mileage oil until about 275,000 miles. It's got 325,000 on it now, and is still running fine, but to my ear the engine is sounds a little worn. For most of its life it got either Castrol or Mobil1 5w-30. Now I use Castrol high mileage 5w-30, which is a synthetic blend, and change oil at 7,000 miles. If I was doing city driving, I would drop that to 5,000 miles.
Any modern lubricants are miracles compared to what we used to use. I had a daily commuter once that gained 5 mpg in 9 years, just because of oil upgrades. All that friction used to go into engine wear, which is a major reason modern engines run virtually forever. I have a friend with a Ford SUV (can't remember the model) that has over 550,000 miles on the original engine.
amazing! seems 200k mark on cars are just a stepping stone now and days ha ha.
Yeah Ive been told cars can go up to 500 - 800k miles - just repair as you go and will be cheaper in the long run than buying a new car. I am planning to keep my lexus since I am not really into new cars anymore plus all this new technology on cars = more expensive
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