What weight oil do I use in 1988 22re engine for a 4 runner

if you can find a motor oil leak while in the wave runner
rear engine seal / oil filter seal /rocker covers front cover seals
lift the motor out and replace all the engine seals and gaskets


unseen internals
hardened valve stem seals /burning oil through rings

synthetic oils maintain a fairly constant viscosity through out the operation heat range , where as mineral oils change viscosity as the engine gets hotter ( synthetic oils 20 w and minerals 15w-40 )
It could be a manufacturer requirement to maintain warranty but it is generally accepted that mineral oils and synthetic oils have small differences in the life of an engine
Talk with an oil manufacturer such as castrol, shell etc and with your service dealer to get a better understanding of the requirement

Use only the oil weight on the oil cap or owners manual if the cap does not list the oil weight. Most older vehicles called for eather 10w30 or 5w30 depending on the ambient temp. In the past 10 or so years, manufacturers updated engines for better fuel efficiency by tightening tolerances in the engines, thereby needing a lighter oil weight to provide sufficient lubrication for the parts So manufacturers started requiring 5w20 oil in their engines. I work as an Auto Care Technician at Walmart, and we will NOT do an oil change for any weight other than the recommended weight by the manufacturer. If it calls for 5w20, we use 5w20, regardless of what the owner wants. This is to avoid any possible engine oil related problems. People will blame someone else if they have a warranty issue the dealer refuses to honor for whatever reason, and it would go back to the last place the vehicle had the oil changed at. So therefore at Walmart, we follow the manufacturers recommended oil weight for all oil changes.

10 w 30 valvoline is what I run in my 2.3

this toyota 4 runner takes 5.2 liters of oil and the correct oil is 5W 30 motor oil. hope this helps.

5 qts of 5w-30.

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 benefits.

on the cylinder head ,u must check for the oil seals on for the valve if one of the oil seal leaks engine oil will come to the compression chamber,this oil burn and make that white smoke

if its over the fill line yes it is a problem. did you wait 5 minutes after runing the engine then check? if you did and the oil is high i would think this is a problem. you can get a trukey baster or hand pump and pump some oil out the fill cap.

Hi there
You should check the oil pressure sensor/wiring should be located around the oil filter area usually.
If you can't see any obvious issues than post another question with you progress and ill help you work through it...

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.