Greetings, my friend, I am from Venezuela, I am writing to you because my brother bought a 1993 Blazer van 3 weeks ago, from the Blazer square similar to the s10 but closed, she brings a 4.3-liter V6 petrol engine, the man who sells it tells her That the truck is in good condition. and aesthetically this painting is 100% 100% air-conditioned box 100% upholstery and 4 rubbers (tires) at 80% life 4 ... the truck looks great ... well the thing is that my brother the purchase ... according to the owner the truck made the engine last year from 0, all new was rectified to 0.20 ... and according to the owner the engine is in excellent condition ... My brother buys it and at once sends him to make oil change to the engine ... new belts ... the same oil recommended by the previous owner that was placing him since he repaired the engine ... Mineral 20/50 .. the thing turns out well ... a week after buying it and after 6 days of the oil change my brother checks the dipstick to measure it and it is missing 1 liter ... he was at a minimum ... my brother and I missed buying another liter of oil and it is complete ... I remain in Full .. the engine feels good does not smoke, you have no strange noises, the thing is that after 5 or 6 days my brother returns to measure the rod and is missing 1 liter of oil again and scared he tells me the truck is consuming oil ... come back to buy a liter more ... and it is placed about 4 days ago ... today I go out in the van to try it .. the accelerator, I snore the exhaust to see if it smokes when it has been on for a while and nothing escapes Boot no smoke. the spark plugs come out clean ... but the truck consumes oil has only 4 days of having placed a liter and the rod remains in FULL and it already has half a liter of oil left: S osea has little left for the rod to mark ADD, which can If the vehicle is parked daily, the engine looks clean, does not smoke and the spark plugs look clean, what is happening here? the truck only travels around 20 to 30 km daily from home to work every day, it is not a long trip ... we are talking about 200 km per week for 1 liter of oil per week ... consumption is excessive ... weird is that the engine does not feel bad, it has no failures, I don't know the truth to think ... The only thing that I see strange is the oil pressure .... when it turns on in the morning it is at 50 PSI but after it has more than 10 min on it is at 20 psi when it accelerates it reaches 30 psi ... but I never know has gone to 0 ... I think it's a bit low but for such excessive consumption I don't think ... what do you say

Good morning Alexander. Maybe the oil you are putting is evaporating. Are there oils of not so good quality, are you putting oil in bulk or are you using a specific brand? I know the oil is quite expensive here. Some time ago a company worked and the oil that was placed on their trucks was mineral and it evaporated. We changed it to semi-synthetic and the problem was solved. Verify and comment. regards

Did you check with the seller that ?, It was a mistake to immediately send the service for oil change, you should try it well several days or a week and make sure that everything is fine even the oil as a guarantee of the words of the seller, what would happen if the previous owner did not happen and the cause is for the oil you put? Not all the oils sold in Venezuela are good, they evaporate, there are many pirates that are not what they claim to be, they link them with something else and seal them the same, you have to be piled in that if you don't run out of engine in less than one year, the same happens with the brake fluid, they are linked with water and with a machine they are sealed again, oils for gearboxes, in short ...

Hello, I would check the compression of the truck before anything else ..

if the exhaust pipe is wet with oil, the problem of low oil pressure may be due to a pressure leakage from the camshafts or the return of the oil pump, the pump has a record which drifts to the crankcase from a certain pressure. One test that can be done is to let the oil reach the minimum which does not mean that the engine is running without oil, the manufacturer puts the cunt when the crankcase has 75% oil, Walk it a little and see how much oil disappears.

sorry the time had not answered before, and the truck was repaired .. the problem was that the engine was bad was badly repaired, just ring to sell it and my brother bought it and the engine already needed to rectify ... that's why they have to be aware when buying a used car ... the consumption was that the engine was lifting the compression even if it did not smoke from the exhaust, at least it was not so visible unless when it had been on for a long time it was seen and it smoked , when removing the pcv the smoke can be seen coming out of the lid and the hose ... a little oil was coming out of the pcv, the oil pressure was low by the cambolt bushings. that is why it burned according to the mechanic too .. well my brother under the engine, it was rectified I remain at 0.40 I put everything new, I order to rectify guides of new valve rubber, piston gaskets all until new spark plugs I place ... the good thing was that the mechanic I delivered the truck to my brother for 20 days and has been using it daily and the engine is excellent .... I just finished using oil and headaches ...