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Either one is fine, one is a little thicker.
Then the multigrade motor oil was made.....multi grade means: a
different viscosity (thickness)when cold & hot. *Why use a multi
grade oil? Because the first number 20w / 10w /5w / 0w is the viscosity
of the oil at startup/ cold temperature which lubricates better on
start up getting to places the thicker oil wont on startup - when the
motor starts to warm up then you have the second number eg. if your oil
is a 10w-30 the motor starts up with the oil thinner at 10 weight and
as it warms up to operating temperature its thicker to 30 weight. The
reason it has thicker oil is to handle the heat etc. Now on a
80Farenheit day / 30 degree C day that thickness may change a bit but
it still thinner than the 30 at startup.
I personally prefer MOBIL1 brand ..You can decide as per your wish..
SOME ADDITIONAL INFORMATION:
There are many grades of oil weights whichever you want to call it. Heres how it works
Oils main job is to keep the engine clean, lubed, running cool ect. The
grade usually 5w20 5w30 or 10w30 ect. Theres many of them as well which
can be consfusing at times. Oil weight is measure by cold and hot . For ex: 5w30 The 5 weight is when the oil is cold and 30 is the weight when its hot. The reason being is the the less the weight when its cold the easier the oil
can get to the top of the engine and lube it to prevent cold engine
damage. Once its heated up its a 30 weight and is thick enough to
protect your engine.( most engine damage is caused when the engine is
cold )You should use the proper grade that your engine calls for. Being
toyota its probably 5 or 10w 30.If you live up north i would recommenda 5w30
weight.You can easily find out which grade you should use by your
owners manual or under the hood on the oil cap. However there are synthetic oils as well. Synthetic oils have man made additives to help the engine run cooler, the oil
is naturally slicker to help it move around easier and boost
performance of the engine resulting in better mpgas well. They have
alot of additives to prevent engine wear ect. One good thing about a
synthetic oil is you can go longer on the oil change. Instead of the normal 3,000 miles oil
change you can go 4 or 5 k. Theres also synthetic blends. Which are
good too but youll have to read about it more to decide for yourself
what you think you need.
Synthetic oils are better for someone who travels alot or puts extreme
conditions on an engine such as idling for long periods of time stop
and go traffic its really good for anything to be honest.. I would recommend
using synthetic if you decide to keep the car for a while. It has many
With that many miles there is no point in putting synthetic oil in the engine because it will probably be too thin and cause the seals to start leaking. Keep the oil changed regularly (every 3000 miles) and use a brand name 5W-30 grade oil like Mobil1 or castrol. As far as gas goes I would put a tank of high octane gas in about once a month. You can try using high octane all the time but check your mileage per tank on the regular grade and then after you've filled you car about 4-5 times with high grade so you can see if it really is making a difference. Also check your owners manual to see if it recommends higher grade gasoline.
Drain engine oil and replace oil filter(your local automotive store will have a book telling you what oil filter you need to buy). You've probably been using a multi-grade 10-30 or 10-40 weight oil. Or a straight 30 weight oil. Regardless, replace that oil with one grade heavier, single-weight of oil. During warm months, use 40 weight; in the winter (depending on how far the mercury dips in your part of the country) use 20 or 30 weight. Slightly thicker oil won't hurt that worn engine, and if your battery is good, it'll turn over fast.