These are the 5 oasis:

Northern Mendoza
It covers the lowest area of the region, watered by the Mendoza River.
Lavalle and part of Maipú, Guaymallén, Las Heras and San Martin departments are included within this area.

Altitude ranges from 600 to 700 meters above sea level. Lands are not very sloped, but yet deep.
This region is suitable for white wine growing, such as Chardonnay, Sauvignon, Chenin, Ugni Blanc and Torrontés. Among red varieties, Syrah, Cabernet Sauvignon, Bonarda, and Malbec find a good place to grow here.

Eastern Mendoza
This region is a real wine power, considering the vineyard planted surface and the wineries located there. Height ranges between 600 and 750 meters above sea level, and relief presents significant differences in terms of weather, soil and temperature range.

Junin, Rivadavia, San Martín, La Paz y Santa Rosa are part of this region.

In the areas nearby the city, soils are unable to drain water; while on the most eastern parts of the region (Santa Rosa and Rivadavia) the soil is typically desert, with sandy soils which do not retain water.

Furthermore, temperature range is quite wide, due to desert weather. All the wine varieties are cultivated in this region, but Chardonnay, Sauvignon Blanc, Chenin, Torrontés, Viognier, Sangiovese, Syarh, Bonarda and Tempranillo excel.

Mendoza River Area
An ancient and traditional wine region is located at Luján de Cuyo and Maipú departments. They are known as “the first wine area” of the Argentine wines. Such appellation arises from the international prestige that wine labels of this area have gained, considered the top quality wines of the country.
The privileged location, to the south of the City of Mendoza, the ideal height above sea level (650 to 1060 meters) and a perfect soil composition help to maintain this reputation.

Malbec is the emblematic wine variety of this area, and even the province and the country, though Cabernet Sauvignon, Merlot, Pinot Noir, Syrah, Chardonnay and Sauvignon Blanc stand out too.
The “first wine area”, together with Uco Valley, has become on of the most attractive wine regions for foreign investments, which have continuously been settling in the country since 1990. The prolonged age and reduced size of the vineyards of this area let to the development of boutique wineries possible.

Uco Valley
This area covers the highest vineyards of the province: up to 1,400 meters above sea level.
Tupungato, Tunuyán and San Carlos are located in this area.

Characterized by a top quality red and white wine production, wines grown in this region are suitable for prolonged ageing.

The typical wine varieties of this area are Semillon and Malbec, but Chardonnay, Cabernet Sauvignon, Merlot, Tempranillo, and Syrah have been recently implanted, with excellent results.

Southern Mendoza
Located between latitude 34.5º and 35º south, this region covers San Rafael and General Alvear departments.
Height goes from 450 to 800 meters above seal level, with 1% slopes.

This area is the main producer of Chenin, but other varieties like Chardonnay, Sauvignon Blanc, Malbec, Merlot and Cabernet Sauvignon are also cultivated.