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Lamar Hirthe

Feb 20, 2025

what happens when you put the wrong oil in your car?

I have a 1997 Mazda 626 with 150k in miles. I added 5w30 oil when it should have 10w30 oil. Will I harm my engine if I don’t change it immediately? I was hoping to wait until next weekend to change it but I will drive approximately 100 miles between now & then just commuting to work (20 miles per day). I live in Los Angeles, CA. Please let me know. Thanks. =)

10 Answers

I have my own oil shop and no it’s not bad the numbers are just the weight of the oil and since u have alot of miles on your car it’s best to use maxlife it’s for cars with alot of mileage on it that’s what I use on my truck..and your car will be fine... Show More
No, it will be fine and you can safely leave it in until the next oil change is due. There is no need to change it. When a maker recommends a particular grade of oil it is, presumably, because that was the grade that they found suited a particular engine the best. That does not mean that other oils are bad for it. On a 6 year old Mazda a change of 1 grade will not matter an iota.... Show More
This Site Might Help You.RE:what happens when you put the wrong oil in your car?I have a 1997 Mazda 626 with 150k in miles. I added 5w30 oil when it should have 10w30 oil. Will I harm my engine if I don’t change it immediately? I was hoping to wait until next weekend to change it but I will drive approximately 100 miles between now & then just commuting to work (20 miles…... Show More
Petroleum based oil is definitely not a good choice but you don’t need to worry until your next oil change. Just remember to keep some that’s left over for when you need to add a bit between oil changes.... Show More
According to the mobil1 website, both Mazda engines in the 1997 4 and V-6 engines in a 626 are supposed to have 5W-30 in the crankcase year round.... Show More
nothing serious at all i change my oil around from season to season… it is safe to change it in 3000 miles... Show More
Won’t hurt it, just use the right kind next time... Show More
it won,t hurt it one bit ! both 5w30 and 10w30 turns into 30 weight anyway after it gets warmed up !... Show More

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